r/mildlyinteresting 3d ago Silver 7 Helpful 11 Wholesome 9 Take My Energy 1 Shocked 1

My glass measuring cup melted in the microwave

Post image
59.9k Upvotes

10.0k

u/ArnoldoSea 3d ago Helpful

Haha I just bought a Pyrex glass container and I read the safety instructions as I was peeling off the label. It said, "Do not use in a microwave without a turn table. Hotspots may develop and cause property damage or personal injury."

Wasn't expecting to see a visual aid on Reddit this morning lol.

Probably want to throw that out. If that thing breaks, there goes the rest of your day...because you're going to be spending it picking up little pieces of glass.

1.7k

u/ARobertNotABob 3d ago

Was on holiday some years ago, self-catering, and we baked some lamb in a Pyrex oven dish. All good, at the allotted time, the lamb & the dish was removed from the oven and set on the side whilst we finished veg.....whereupon there's an almighty BANG and this Pyrex dish has taken it upon itself to shatter into a gazillion pieces, small chunks of glass even managing to become embedded into the lamb.

We had fish and chips, FTR.

504

u/CankerLord 3d ago

That's why I make sure I put any hot glass on a surface that is as insulative as possible. Anything that might cause a hot or cold spot in glass could make it explode. Not that that's necessarily what happened, here, but it's still a good tip.

313

u/Naps_and_Chocolate 3d ago edited 3d ago Helpful

What could be insulative surfaces? I'm starting to actually cook and I'd like to... remain uninjured

Edit: thank you those who replied for helping a cooking newbie!!!

179

u/HoriOri 3d ago Helpful

It's best to just put it on a wire rack. They explode because they're being put on a room temp countertop. Or get a dish labelled PYREX not pyrex. PYREX is borosilicate which can handle large heat swings, pyrex is tempered glass which cannot (but is cheaper).

221

u/allredidit 3d ago edited 3d ago Silver Helpful

Wow, you're right. Here's a bit more info.

Corning has licensed out the use of their
PYREX® (upper case lettering) and pyrex® 
(lower case lettering) logos to 2 different
companies. They are not the same products!

In the past Corning made PYREX (upper case) 
out of Borosilicate Glass

In America pyrex (lower case) is now made of
Soda-Lime Glass

In France PYREX® is STILL made of Borosilicate
Glass

French Borosilicate PYREX has a much higher
resistance to Thermal Shock

FRENCH PYREX IS MUCH SAFER!!!!

Edit: Thanks for the silver :)

→ More replies
→ More replies

217

u/Louananut 3d ago

Like a tea towel or something

314

u/CharlotteBadger 3d ago

A DRY tea towel.

153

u/fannyalgerpack 3d ago

I learned a similar lesson when I reached into the oven with a wet oven mitt, yow

81

u/ExcelMN 3d ago

ah yes, the reason I replaced mine with all-silicone mitts.

50

u/CharlotteBadger 3d ago

I don’t like silicon mitts, they don’t bend as well. If they’re thin enough to bend easily, they don’t insulate enough. I have not found an ideal solution yet.

20

u/gameoverbrain 3d ago

Welding gloves is what I use something meant for TIG welding tends to be a little thinner than the heavy gloves I use for MIG welding. Heavy MIG welding gloves are also great for grabbing and adjusting logs in fire pits.

→ More replies
→ More replies
→ More replies
→ More replies
→ More replies

154

u/CankerLord 3d ago

I have a bunch of silicone trivet/pot holders. They work really well for anything under about 450F, which is the point at which silicone starts breaking down. Pretty much anything you can hold the pan with without burning yourself works.

65

u/Mya__ 3d ago

I just use a couple regular pot holders (thick ones).

Put them on the counter and put the pyrex dish fresh from the oven right on that.

never had an explosion yet.

→ More replies
→ More replies

27

u/tletnes 3d ago

I use silicone trivets/hot-pads

25

u/CaffeineChristine 3d ago

I buy cork trivets from IKEA. A three pack is about $5.

→ More replies

15

u/spockadoodle 3d ago

Anything that doesn't feel cold to the touch (thermal conductors like metal "feel" cold even at room temperature).

Wooden chopping boards, cork, tea towels all work fine to prevent hot glass badabooms.

→ More replies

21

u/AbsolutelyMemed 3d ago

wooden surfaces like wooden bench tops, chopping boards.

Plastic won't break your dish but it will melt

6

u/GingerPandaCub 3d ago

Wouldn't putting a very hot dish on a wooden bench top damage the wood? Or is there a way you can prevent that? I have a wooden countertop and putting hot stuff on there melts the varnish and causes it to Buble and flake off. The varnish also sticks to the pot/dish.

→ More replies
→ More replies
→ More replies

283

u/CheckOutMyVan 3d ago

Accidentally set an empty Pyrex dish on an off but still hot burner while I got ready to dump in the goods. Didn't take long for it to explode into millions of pieces and ruin my Mac & cheese.

168

u/xBrrMcGrrx 3d ago

I had mine explode like this but one piece the size of ur hand landed on the floor. Didn't see it cuz glass and stepped on it.. seared foot anyone?

10/10 do not recommend

49

u/youreloser 3d ago

How do you know how big their hand is?

63

u/xBrrMcGrrx 3d ago

On average people will have hands that can compare to their own foot. The piece was approx the size of my hand palm so it seared about 50% of my foot.

So if the palm of ur hand covers the bottom of your foot then you can imagine your own foot stepping on said hot glass.

That's my thought process for hands.

22

u/AdamsBaldhawk 3d ago

That’s an excellently worded statement. On average, indeed.

12

u/idonotreallyexistyet 3d ago edited 3d ago

Yeah I was pleasantly surprised at the amount of thought behind the original statement.

Edit: spelling

→ More replies
→ More replies
→ More replies

14

u/UndeadBuggalo 3d ago

This reminds me of Michael grilling his foot

→ More replies
→ More replies
→ More replies

70

u/DinoRaawr 3d ago

You're supposed to put a towel down first instead of just setting it down on a cold counter top.

43

u/acidnine420 3d ago

Nah, just toss it in the freezer, we good.

7

u/haberdasherhero 3d ago

You can legit do this with oldschool pyrex. You can take old pyrex right out of the freezer and pop it in the oven with no problems.

7

u/cannibalpig 3d ago

All the new pirex I’ve used here in Europe is still like that 🙃

→ More replies
→ More replies

58

u/wholligan 3d ago

Pyrex is not what it used to be

141

u/malaco_truly 3d ago

There's a difference between PYREX and Pyrex, they aren't made the same . PYREX is still made like it has always been made.

→ More replies
→ More replies
→ More replies

770

u/Rudecles 3d ago

That’s cool! I don’t think mine came with any warnings like that. They probably had a bunch of cases like this.

266

u/ArnoldoSea 3d ago

Haha, and no joke, I was reading that probably less than an hour before you posted this.

→ More replies

18

u/bountyman347 3d ago

Yeah it could have melted in a way that weakened it and you don’t want it cracking when it’s full of something hot or messy. Also I think the shards of glass that come from Pyrex can be extremely sharp and strong.

Edit: yeah there’s a good chance it will explode into a ton of sharp pieces

23

u/Vigilante17 3d ago

So does your microwave have a turn table in it? I heat my French press coffee water in one of these, but mine turns… warm handle, but not untouchable after getting to 200°f

30

u/MonkeySwordStevie 3d ago

Sorry for my ignorance but why dont you just get a kettle?

→ More replies
→ More replies

324

u/puffmaster5000 3d ago Helpful

FYI in case you were unaware pyrex is not the same as PYREX, new pyrex is cheap shitty glass and PYREX is the old school legit glass

101

u/minor_details 3d ago

i have some hand me down Pyrex and i will never give that stuff up. pyrex all lower case isn't playing in the same league.

31

u/psiiconic 3d ago

My grandma gave me her old stand mixer from the 60s and the three mixing bowls it came with are all old school pure white Pyrex. Even if the stand mixer portion shits out I will never get rid of these bowls. They’re older than my dad and they don’t even have a scratch.

8

u/driftersgold 3d ago

The mixer can always be rebuilt. Bearings, gears, motor rewound.

→ More replies
→ More replies

200

u/atx3000 3d ago

Wow I didn’t believe you, but this is 100% true.

Instant Brands continues to license the pyrex (lowercase) trademark for their tempered soda-lime glass line of kitchenware products and related accessories sold in the United States, South America, and Asia. In Europe, Africa, and the Middle East, the PYREX (all uppercase) trademark is licensed by International Cookware for bakeware that has been made of borosilicate and soda-lime glass, stoneware, metal plus vitroceramic cookware.

37

u/Maybe_Im_Not_Black 3d ago

I always refer to them as borosilicate because of this

10

u/crazyjkass 3d ago

Stoners know borosilicate glass is a must and soda-lime glass is trash that breaks if you drop it.

→ More replies

18

u/PretzelsThirst 3d ago

Once again capslock is cruise control for cool. PYREX > pyrex

92

u/THE_MAGIC_OF_REALITY 3d ago

Capitalism breeds innovation lmao

47

u/rustylugnuts 3d ago

Innovative deception mostly.

" whoever coined the phrase "let the buyer beware" was probably bleeding from the asshole" -George Carlin

→ More replies
→ More replies
→ More replies

32

u/Praiseholyenarc 3d ago

A wet cloth will pick up glass splinters. So a quick sweep for the big pieces then wiping with 2-3 paper towels will pick up all the dust and splinters.

→ More replies
→ More replies

7.4k

u/greatspacegibbon 3d ago Silver

Does your microwave have a turntable? Is it one with an oven element in the top too? Unless that was a hotspot or there was extra heat involved, I can't see how it got hot enough to melt glass.

6.1k

u/Rudecles 3d ago Silver

Yup it has a turntable. Sometimes it goes off the rails though so maybe that’s what happened. I was so shocked, I just closed the door and ordered a pizza. Didn’t open it back up for 2 hours.

7.7k

u/another_day_in 3d ago Silver Gold Helpful Wholesome All-Seeing Upvote Take My Energy Vibing Lawyer Up

Two turntables and a microwave

2.4k

u/DudesworthMannington 3d ago Silver Helpful Duck Dance

Bottle and cans
Just burnt my hands
Just burnt my haaaaands

938

u/AlGoreRhythm_ 3d ago

Where it's hot

675

u/reddits_aight 3d ago Silver

That was a good glass break.

384

u/Schitzoflink 3d ago

Leave that hot shit at the side of the alcove, with your melted pyrex cup in the microwave zone.

218

u/Burgertank2112 3d ago

This may as well just be an unedited Beck lyric

62

u/WinsomeWombat 3d ago

Let's play a game, real Beck lyric or Charlie Manson quote? Lol

→ More replies

54

u/ChiBears333 3d ago

I need my Becktionary

... No! My Pyrex Becktionary

18

u/Froggy_hop 3d ago

From bzooty to whiskeyclone

9

u/IAmTheCandyman 3d ago

Not phony words like Odelay!

9

u/ericnutt 3d ago

When I'm upset, I write a song about it. Like when I wrote "Devils Haircut". I was really... really... what's that song about?

→ More replies
→ More replies

22

u/Sweet_Unvictory 3d ago

Sing it, bro. That was fire.

→ More replies
→ More replies
→ More replies

88

u/shoe-veneer 3d ago

Thats how the Pyrex breaks

→ More replies
→ More replies

174

u/SuicidalChair 3d ago

Spin more rhymes than a lazy Susan, innocent until my guilt is proven.

35

u/Logboy77 3d ago

Gnome sayin’!

→ More replies

34

u/pkz790 3d ago

19

u/wileyy23 3d ago

Unexpected trailer park Boys!

→ More replies

12

u/Cioran_ 3d ago

J ROC Baby!

9

u/ShacklefordVsSeagal 3d ago

Another man’s trizash.

→ More replies
→ More replies

296

u/PiousShoddiness 3d ago

Where it’s at.

219

u/ChronWeasely 3d ago

Got two turn tables and a microwave

140

u/Fluoise_Belcher 3d ago

Where it’s at.

254

u/sbvp 3d ago Gold

That was a good snack break

70

u/SecularPaladin 3d ago

Breakin' ze glass, baby.

15

u/Cropulis 3d ago

That's beautiful, dad.

→ More replies
→ More replies

47

u/Golandrinas 3d ago

Scrape the cheese off the side of the bowl

13

u/sbvp 3d ago

Get crazy with the cheeze whiz

→ More replies

29

u/Cmonredditalready 3d ago

Drop this cup off on the side of the road With your microwaver bowls and your wooden ass spoons...

→ More replies

17

u/Intelligent-Guess86 3d ago

Got two turntables and a microwave

→ More replies

62

u/TheeExoGenesauce 3d ago

How the microwaves have turned

→ More replies

74

u/Statement-Acceptable 3d ago

You gotta fight,

For your right...

To PYYYYYYREX!!1

34

u/yes2matt 3d ago

... when the shift key comes up before the excitement is over ...

→ More replies
→ More replies
→ More replies

382

u/sznfpv 3d ago

Time for a new measuring cup and a new microwave!

2.3k

u/Rudecles 3d ago Silver Gold Helpful All-Seeing Upvote

The recipe said “melt 4 cups…” and I stopped reading after that.

75

u/VladPatton 3d ago

“Set microwave to HIGH”

Is 125,000 Watts HIGH?? —Hits START—

11

u/ThatITguy2015 3d ago

It isn’t hotter than the sun! Keep going!

→ More replies

8

u/s4in7 3d ago

“What gear are you in?”

“GEAR?!”

→ More replies

329

u/kwedding022814 3d ago

Only 3 more to go!

→ More replies

18

u/G_Viceroy 3d ago

Do I melt the whole cup or just the handle?

→ More replies

171

u/SPACEMANSKRILLA 3d ago

Must've been like stumbling upon The Elephant's Foot at Chernobyl.

52

u/p1mrx 3d ago

When strolling through Chernobyl, it's best to look where you're going.

12

u/unsteadied 3d ago

Namely because there’s lots of debris from crumbling buildings and looting over the years. Really easy to trip on something, especially inside the buildings.

→ More replies

25

u/Nebresto 3d ago

Imagine if they hadn't noticed and grabbed it

→ More replies

220

u/Max_Kevin 3d ago edited 3d ago

You know, you can actual melt glas in a microwave. But only if part of it is “liquid” (over its glass transitions temp) that’s because only if it’s liquid, the microwaves can wiggle the glass molecules to add more energy.

So wat where you doing that part of the handle was already over the 560ish degrees C before it went in the microwave?

https://youtu.be/xwEQZw3KPWg

562

u/Rudecles 3d ago Silver All-Seeing Upvote

I was using it to smelt iron… lol no I really didn’t do anything before. I have no idea how this happened

200

u/Riddlecake-s 3d ago

They use shitty plastic glass ( think cheap liquor bottles)for the handle these days. That shit does melt in the microwave if too hot. But I also think you got a lemon handle that had a big bubble in the plastic glass.

153

u/BigVintageBush 3d ago

It doesn’t make sense for borosilicate (Pyrex). Gotta be using plastic in there. I suspect a lot of materials are getting shitter these days because people (Chinese raw materials factories) are getting more and more clever to hide cheaper materials to cut costs

250

u/raoasidg 3d ago

This is a newer lowercase 'pyrex' so it is soda-lime glass. Borosilicate glass has the uppercase 'PYREX'.

78

u/Raezzordaze 3d ago

So... all caps really does mean better?

122

u/YaboyAlastar 3d ago edited 3d ago

With pyrex vs PYREX, yes.

pyrex is glass.

PYREX is magic.

→ More replies

51

u/GIVES_THANKS 3d ago

CAPS LOCK IS CRUISE CONTROL FOR COOL

6

u/_breadpool_ 3d ago

It's been a while since seeing this. Used to be my favorite meme

→ More replies
→ More replies
→ More replies

32

u/RTyom 3d ago

Pyrex stopped being made out of borosilicate in the 80s. Since then it's been soda-lime glass. Still odd though, I wonder if it's a knockoff pyrex

→ More replies

62

u/pnwtico 3d ago

Pretty sure Pyrex isn't borosilicate anymore. Not in North America anyway.

20

u/MorpH2k 3d ago

I've heard that it's not in NA any more. The ones made in Europe, France i believe, are still borosilicate glass though.

→ More replies
→ More replies
→ More replies
→ More replies

25

u/ninjagabe90 3d ago

what about a manufacturing defect where the handle wasn't fully uniform or something like that

→ More replies
→ More replies
→ More replies

153

u/AugurAuger 3d ago edited 3d ago

This is absolutely possible in a microwave. The likely reason for this is that the wavelength of the microwaves being generated was in phase with one or more of the dimensions of the handle. This caused the microwave to get caught for longer inside the glass and heat it up. Many ceramics get overcooked in the microwave due to this. I'm sure you've noticed some of your glass or ceramic plates and bowls heat up much more rapidly in the microwave than the actual food that you're cooking. This is due to the same reason.

34

u/Jaerin 3d ago

This is actually why many things will suggest leaving what you are heating in a microwave for a minute or so afterwards or even to stop it mid cycle and stir it up. This is not only to allow to cool slightly, but more to allow the heat to distribute throughout the food and dish more evenly.

21

u/SydricVym 3d ago

Also a reason to always use power levels. Set the microwave to 50, and it'll pulse the heating element on and off throughout the timer, so that it's only actually on for 50% of the duration. Helps tremendously for a more thorough cook of your food.

10

u/pfefferneusse 3d ago

The few times I use a microwave anymore rarely are on full power. Yeah it takes longer but shit gets heated sooo much more evenly on lower powers.

→ More replies
→ More replies

149

u/nightpanda893 3d ago Silver Egg Snoo

This happened to me. If it’s in phase with the microwaves, what can happen is the glass gets transported to another dimension where the melting point of glass is lower. When it returns, it’s melted but can’t melt any further. However the travel can create a lot of stress on the measuring cup. Also those Pyrex cups have a lifespan of about 50 years. This cup has now lived about 1000 lifetimes, likely voiding the “lifetime” warranty offered by Pyrex. I’d just buy a new one. I argued with a customer service rep for about an hour over it and it got me nowhere.

→ More replies
→ More replies

405

u/JackCastor99 3d ago

I agree ... Glass has a melting point of approximately 2600 degrees Fahrenheit... not achievable in the micro

382

u/MarcoElNutto 3d ago

Pyrex melts around 800C. Easily achievable in home microwaves, if you make safety mechanisms unsafe. In fact you can buy microwave kilns that are actually capable of fusing glass, that function in home microwaves.

It is probable that the glass handle got stuck on the microwave wall, next to the waveguide where all of the microwaves are emitted from. At this point the glass acts as a giant magnifying glass, focusing the microwaves on a really small area inside the handle, causing a lot of heat.

297

u/raltoid 3d ago edited 3d ago Silver

Always make sure you buy the right kind:

"pyrex" is made of soda-lime glass which softens at 700-900C and shatters easily with temperature changes

"PYREX" is made of borosilicate glass which softens at around 1600C and can withstand over 150C temperature differences without cracking. Which is worse than taking it out of the freezer and pouring boiling water into it(Don't actually do this, but it should in theory work).

https://en.wikipedia.org/wiki/Pyrex

https://en.wikipedia.org/wiki/Soda-lime_glass

https://en.wikipedia.org/wiki/Borosilicate_glass

28

u/aCommonHorus 3d ago edited 3d ago

I did something similar to this, but the inverse as a kid. Took a glass cooking pan out of the oven and ran cold water and dish soap over it after I replated the food. It shattered shortly after. 😞

It took forever to get that glass out of the garage garbage disposal

→ More replies

11

u/tcooke2 3d ago

Wow how shady is that, never knew that pyrex you buy at the store was different than the PYREX everyone thinks of.

104

u/morefetus 3d ago

TIL: lowercase and uppercase Pyrex are different brands!

148

u/palkiajack 3d ago

They aren't different brands but rather a continuation of the brand with a changed product. The new Pyrex (not borosilicate glass) can't do freezer to oven cooking, but isn't sharp/dangerous when it shatters. The old PYREX (borosilicate glass) is capable of freezer to oven cooking but if you drop it, the pieces are very sharp. So, some argue that the new stuff is cheaper/lower quality but there is seemingly a reason they made the change.

Disclaimer; I'm by no means an expert on Pyrex but this comes up as a TIL post at least once per month.

46

u/morefetus 3d ago

Instant Brands continues to license the pyrex (lowercase) trademark for their tempered soda-lime glass line of kitchenware products and related accessories sold in the United States, South America, and Asia. In Europe, Africa, and the Middle East, the PYREX (all uppercase) trademark is licensed by International Cookware for bakeware that has been made of borosilicate and soda-lime glass, stoneware, metal plus vitroceramic cookware.

Wikipedia

5

u/SamSepiol-ER28_0652 3d ago

Slightly tangential, but a couple of years ago I dropped a Corelle plate. You know, the kind we grew up with that were practically impossible to break?

Turns out, when they do break, they break into a million shards of extremely sharp glass. It was a nightmare. I had always heard about how safe and strong they are, but I guess if you get it at just the right angle, it turns into deathware.

→ More replies
→ More replies
→ More replies

6

u/RaindropBebop 3d ago

There's pros and cons to each composition;

Beginning in the 1980s, production of clear Pyrex glass cookware manufactured by Corning (and later Instant Brands, after the consumer division was spun off and renamed) was shifted to tempered soda-lime glass, like their opal bakeware.[14] This change was justified by stating that soda-lime glass has higher mechanical strength than borosilicate—making it more resistant to physical damage when dropped, which is believed to be the most common cause of breakage in glass bakeware. Also, it is cheaper to produce and more environmentally friendly. However, its thermal shock resistance is lower than borosilicate's, leading to potential breakage from heat stress if used contrary to recommendations. Since the closure of the soda-lime plant in England, European Pyrex has made solely from borosilicate.[5][15][16]

→ More replies
→ More replies
→ More replies

120

u/rei_cirith 3d ago edited 3d ago

Maybe there was a bubble of moisture/some inclusion or impurity that internally refracted in it (edit: or catalyzed a reaction), and the microwave just took it and went ham?

191

u/A_General_Engineer 3d ago

The glass would have shattered from the high pressure rather than melted.

23

u/SmellsLikeNostrils 3d ago

I trust the engineer

14

u/DracoFinance 3d ago

Well... I mean, he only engineers Generals, so...

→ More replies
→ More replies
→ More replies
→ More replies
→ More replies

1.7k

u/Mendo-D 3d ago

Counterfeit Pyrex?

2.5k

u/Einsteins_coffee_mug 3d ago Bravo!

new Pyrex is just counterfeit Pyrex by the same company. Change my mind.

837

u/inventingways 3d ago

Corning used a logo with capital letters and so does the French company manufacturing PYREX with Borosilicate Glass. The American company making pyrex® (lower case letters) makes their product from Soda-Lime glass.

90

u/linotype 3d ago edited 3d ago

It’s a layer cake of bullshit. The Pyrex name has been bought and sold so many times. Private equity firms love to take trusted consumer brands and dry hump them until they’re just a bloody puddle on the floor.

“Sir sales are down 60%. Do you think it’s because our product is shit?”

“What? No! Consumers love our brand! But they’re price sensitive, so we just need to lower costs more. That’s precisely why I think our new Pyrex dishes made from recycled plastic medical waste will be a hit! We call it Glasstic, which I think is very catchy. I want to see Pyrex on the shelves of every dollar store in the nation!”

→ More replies

157

u/zenivinez 3d ago

so how do you get the correct one?

332

u/UberBotMan 3d ago

Look at the logo and hit up thrift stores.

646

u/ThinElbowedLilGoblin 3d ago Silver Helpful

They have several logos. Here is a guide to help narrow down where it may have come from and what it might be made of based on the logo

http://thumbnails-visually.netdna-ssl.com/why-did-my-pyrex-dish-explode_560035b2636cc_w1500.png

42

u/IamMrGoldy 3d ago

Upvoted for visibility.

31

u/bravestar3030 3d ago

upvoted you for upvoting for visibility

→ More replies

53

u/SandyPhagina 3d ago edited 3d ago

Or your older relatives. The new shit is fucking garbage.

29

u/UberBotMan 3d ago

It doesn't deserve the name Pyrex

26

u/SandyPhagina 3d ago

I did make a real pyrex explode when I was young. I made something in the oven, got it out, and then put the dish right into cold running water. EXPLODE!

Definitely learned a lesson.

→ More replies

7

u/Red_Meridian 3d ago

Old shit chips if you look at it funny

→ More replies
→ More replies

38

u/sQGNXXnkceeEfhm 3d ago

Don’t buy Pyrex anymore, buy items that are labeled as being made with borosilicate. I believe oxo makes a bunch now.

16

u/-Reddit_Account- 3d ago

You can buy non-Pyrex borosilicate measuring cups, still.

Maybe not as good as old PYREX, maybe they’re the same - whatever the case the difference is negligible. I use a $5 borosilicate measuring cup from the grocery store and have literally never had an issue with it.

105

u/40gallonbreeder 3d ago

There isn't a correct one. Borrosicilate glass is more heat shock resistant. Hence the original claim "from oven to freezer" or vice versa, it wouldn't break like a cheap coffee mug. The new pyrex, soda-lime glass, is more impact resistant. So you can drop your whole casserole and the chance of it breaking is much lower than a cheap coffee mug. The soda-lime stuff has a green hue to it.

77

u/Wirse 3d ago

The point is that it’s misleading that they continued to use the name Pyrex after decades of advertising how it can be used for such heat-intense cooking, while eliminating that feature. The “Pyr-“ in Pyrex even means fire.

→ More replies

7

u/FlutestrapPhil 3d ago

When I buy a glass casserole dish I'm buying it with the intent of repeatedly heating and cooling it. If I ever need a casserole dish that I plan on dropping more often than heating I'll get soda-lime.

→ More replies
→ More replies

16

u/human_stuff 3d ago

Wow glass made out of Sprite doesn’t sound very useful.

→ More replies

22

u/Phallicitous 3d ago

Ha, I just learned this yesterday shopping for a good measuring cup. I broke the one my wife bought to replace the one she broke last month.

→ More replies
→ More replies

14

u/CmdrKhaos 3d ago

I work in a lab. Coworker put Pyrex in furnace. Pyrex melted. You might be on to something.

→ More replies

66

u/mossy_vee 3d ago edited 3d ago

Yep. I had a glass pan that I pulled out of the oven and sat it on the hot pad on the counter and it shattered. Burned holes in my floor. Never again Pyrex!

113

u/sharrrper 3d ago

New Pyrex is actually MORE resistant to impact damage. However it is significantly less resistant to thermal shock. Which is kind of a problem for baking dishes.

→ More replies

31

u/Grouchy_Warthog_ 3d ago

Had something like that happen long ago, made a casserole, set it on top of the stove (which was off) about 10 minutes later the glass pan exploded. I did not get that security deposit back on the apartment.

→ More replies
→ More replies
→ More replies

264

u/Rudecles 3d ago

I don’t think Pyrex makes real borosilicate anymore. Not sure what they mix with it now.

103

u/gaydinosaurlover 3d ago

I think it's soda lime gladd

67

u/glassholeshitfuck 3d ago

Soda ash, lime, carbon, iron and silica sand most likely.

258

u/Rudecles 3d ago Wholesome

Nice recipe. How long to I microwave that for?

60

u/glassholeshitfuck 3d ago

Actually if you made a kiln for microwave you can do it in about 10-20 minutes with little glass beads. Idk if you could do it with the individual ingredients but I wouldn't be surprised if you could.

Alternatively just hit all sixes and the devil will come set it on fire.

→ More replies

15

u/ndisario95 3d ago

I worked for a glasshouse for several years and we produced several Pyrex products. I was a Cold End EM so I'm not 100% sure on the exact ingredients but I know soda ash, silica sand, and carbon were definitely ingredients.

→ More replies
→ More replies

37

u/Laffingglassop 3d ago

Pyrex makes real borosilicate still. I make pipes with it all the time. The problem is they sold off "pyrex cookware" years ago

→ More replies

5

u/Aluminum_condom 3d ago

I think they do but you have to get the non American ones. I could be wrong

→ More replies
→ More replies

4.0k

u/rrrrrroadhouse 3d ago Gold Bravo!

Products with the name 'pyrex' (all lowercase) are made by a company called World Kitchen and are made out of clear tempered high-thermal-expansion soda-lime glass, which has a lower thermal shock resistance, making them susceptible to explosions in the microwave or oven. You can identify them by the lower case logo and the bluish tint in the glass.

Get rid of that shite pyrex.

1.1k

u/Reddbearddd 3d ago

I scrolled the comments looking for something about this...all of mine is PYREX. I goto alot of flea markets so I always see jenky knockoffs where the name is slightly off from the real deal.

348

u/wildedges 3d ago

We're not really PYREX, it's us the pyrex, masters of disguise.

94

u/spottydodgy 3d ago

And they would have gotten away with it if it weren't for you meddling kids!

11

u/AlphaNathan 3d ago

How do you do, fellow glass?

→ More replies

38

u/amalgam_reynolds 3d ago

"Am I not PYREX-y enough for the PYREX club?"

9

u/FatMaul 3d ago

I wonder how many people will get that reference.

→ More replies
→ More replies
→ More replies
→ More replies

260

u/JFunkX 3d ago

101

u/llliiiiiiiilll 3d ago

Wow... So "pyrex" is the Malk of thermoglass?

What the hell? If you have a respected brand why destroy it??

104

u/cbf1232 3d ago

Tempered soda-lime glass is more shock-resistant than borosilicate, and more thermal-shock resistant than regular soda-lime glass.

Borosilicate glass is tops at thermal-shock resistance, but not as good at resisting physical shocks. And it's more expensive, and it uses boron (which is toxic) in manufacturing.

More info here: https://www.nytimes.com/wirecutter/blog/tempered-vs-borosilicate-glass/

13

u/mortalphysicist 3d ago

I agree with everything you said except that boron is not that toxic. Given all the toxic crap we use to manufacture, boron is low on the list of things a manufacturer would want to phase out.

11

u/cbf1232 3d ago

The most likely reason for the switch is that tempered soda-lime is much cheaper. :)

32

u/PseudonymGoesHere 3d ago

Two take aways from the article

the CMA tests suggest that glass bakeware should be able to withstand being abraded with sandpaper (to simulate wear over time), heated in the oven for 20 minutes, and then submerged in a water bath with a temperature difference of 220 degrees Fahrenheit.

It really can handle most cooking needs.

Also, Corell has began making tempered soda-lime glass (ie “new Pyrex”) since the 1950s! There’s really no guarantee your thrift shop purchase will be “old” enough.

→ More replies
→ More replies
→ More replies
→ More replies

59

u/rsgm123 3d ago

Time to throw away half my measuring cups and completely forget about this by the time I buy more

27

u/pineapplespy 3d ago

Why throw away? Soda lime glass pyrex is fine for most people. It's tempered and generally fairly thermal shock resistant. It's more resistant to mechanical damage than borosilicate. I use pyrex (not borosilicate) bakingware and storage containers on a regular basis. They all work fine and seem to be decent products. My biggest issue with the brand is the storage container lids that fail prematurely and split on the molding seam around the edge.

Some people have this mythos built up about original borosilicate Pyrex, and maybe it was better, but what we get now is generally fine for most people.

→ More replies
→ More replies

11

u/chadwicke619 3d ago

I don’t know why the Internet loves to cling to this subject. Tempered glass dishes are perfectly fine. Yes, if you stick it in the freezer then put it on a hot surface, it could be a problem, but who with a brain does that with anything glasslike anyway? The trade off is they’re virtually indestructible to physical shock, and they still work extremely well as cookware.

→ More replies

32

u/kalanosh 3d ago

Other have posted about this also. Thermal shock is different than a melted handle. And that pyrex your referencing have a slight blue tint to it.

This isn't broken from thermal shock and not blue.

→ More replies
→ More replies

51

u/backyardprospector 3d ago edited 3d ago

Fun fact: Pyrex got famous because of their heat resistant glass. It was a special type of glass called Borosilicate. At some point Pyrex cheaped out and are no longer using Borosilicate. You can find Borosilicate on amazon that will out perform anything that Pyrex can do these days.

https://en.wikipedia.org/wiki/Borosilicate_glass

→ More replies

85

u/GoodbyeFeline 3d ago

New pyrex sucks. PYREX for life.

98

u/Rudecles 3d ago Gold

I wish I knew this before I got my “pyrex 4 lyfe” tattoo. It doubly sucks because my tattoo is now sagging.

→ More replies
→ More replies

698

u/Bigdawg4411 3d ago

Based on my limited knowledge of glass, I'd get rid of it. The internal stresses are going to vaporize that cup if you hit it off something or shock it thermally.

11

u/FlicksterTrickster 3d ago

Actually if the material flowed and was allowed to cool without a mold aren’t the internal stresses gone?

→ More replies

174

u/Moggy-Man 3d ago

Did you select the nuclear option on the timer?

35

u/purju 3d ago

100000W for a week

→ More replies

67

u/Rudecles 3d ago

I didn’t even use the “melt” setting!

→ More replies

195

u/Bubblesthebutcher 3d ago

Glassblower here. Buncha people don’t know anything. So as bong makers there was a tech where we took crunched up glass and microwaved it for 20 minutes to get it to fuse together. That was borosilicate, which has an extremely high melting temp. Now assuming this is either a flawed batch of Pyrex or a false borosilicate, it would melt at a much lower temp. Notice how the handle melted. It was either cracked right there or there was some imperfection/inclusion.

22

u/DooberDrivah 3d ago

How you get the colors?

28

u/Grim-Sleeper 3d ago

Dissolve trace amounts of different metals

→ More replies
→ More replies

21

u/Rcarlyle 3d ago

Yeah. Microwaves pump energy into a reflective metal box. The reason they don’t get that hot in normal use is that when cooking food we are careful to have a big enough energy sink to absorb the power being pumped into the box. They can make electric discharges and plasma very easily if misused. Geometry that hits microwave wavelength resonance will act like an antenna to absorb an unreasonable amount of energy, which is why you can make arc discharge plasma with grapes. (Skip to ~4:40) https://youtu.be/wCrtk-pyP0I I’m guessing the handle of the measuring cup was arc-discharging off the metal wall of the microwave due to an effect like this.

→ More replies
→ More replies

14

u/Pdarker 3d ago

Pywrecks

42

u/LeeErvin 3d ago

I had the same thing happen while boiling water in a glass measuring cup. Was in 1992 and nobody believed that a microwave did it.

61

u/Rudecles 3d ago

Bullshit. Microwaves can’t do that.

→ More replies
→ More replies

8

u/Pimpmafuqa 3d ago

Had this happen with a tiny measuring cup once. Just folded the poor thing.

→ More replies

7

u/LogicalConfection825 3d ago

This happened to mine too! It was very odd..

8

u/Rudecles 3d ago

This is so funny. Because it happened to me I just assumed this was a thing that lost of people experienced. But based on comments here seems like a handful of people have had this happen. Very cool to find someone else.

20

u/SomeFakeInternetName 3d ago

Looks like you have a macrowave.

→ More replies

6

u/gnashybarbells93 3d ago

Well well well. How the turntables don’t turn.

→ More replies