this post was submitted on 24 Oct 2023
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Casual UK

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[–] [email protected] 7 points 1 year ago (3 children)

"True" Pyrex is made of borosilicate glass and is very resistant to changes in temperature, making it excellent for lab or kitchen use. You can tell when it's "true" Pyrex if the lettering is in all caps. If it's not, it's just regular glass.