Pyrex, like all brands of glass bakeware, is subject to breakage due to thermal shock; Pyrex glass bakeware was originally made from borosilicate glass and is now made from tempered soda lime glass.

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The story of Pyrex glass began like most inventions do: with a problem. Bessie Littleton's earthenware casserole dish had cracked. It was 1914 and Littleton's husband, Jesse, was working as a ...