ALL Pyrex dishes are not created equal – and not knowing the difference could lead to shattered glass all over your oven.
There's a temperature limit that this glassware can stand, and it varies based on the dish – but there is one sneaky detail that can help you out.
In June, a TikTok user showed off her cooking disaster, revealing that her glass Pyrex had exploded and left shattered glass all over her oven.
Responding to her video, Carla from Ontario, Canada identified herself as a Pyrex collector who knows a thing or two about the kitchenware brand.
"Just so you guys know that I'm totally legit, I'm kind of into Pyrex," she said, showing two large glass-fronted cabinets filled with dozens of Pyrex dishes.
She then got down to business, asking about a tiny detail on the other woman's dish.
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"The Pyrex, was it the capital font? Or was it the lowercase font? Because there's a difference," Carla said.
"There's two different Pyrex. There's Pyrex with the capitals, and we've got lowercase."
The one with the name in all lowercase letters has a bit of a blue hue to the glass, while the capital letter one has a yellowish hue.
"The new stuff, lowercase? Soda-lime glass," Carla said.
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"All-capital fonts, the oldy-goldy stuff? Borosilicate glass, and it's got a higher thermal shock resiliency."
Carla said it looked like the other woman's Pyrex exploded due to thermal shock and she was probably cooking it at too high a temperature.
"No putting glass Pyrex under the broiler. No cooking above 425°," she said.
"Personally, for myself, I would never cook with glass Pyrex above 375°. That's my personal comfort level," she said.
Though Pyrex's website doesn't stipulate specific temperature limits for its products, it does offer some care tips and warnings.
The brand says that "uneven heating, direct contact with heating elements, and sudden temperature changes … can cause glass to shatter or break."
Users should always preheat their oven before putting their dish inside and should never use it on a stovetop, in a toaster oven, under a broiler, or on a BBQ grill.
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After cooking is done, the brand says, avoid putting the dish immediately on a cool surface.
Users should let it to come to room temperature before putting it in water, the fridge, or the freezer.
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