Pyrex, like all brands of glass bakeware, is subject to breakage due to thermal shock; Pyrex glass bakeware was originally made from borosilicate glass and is now made from tempered soda lime glass.

Jessica Bolte has a number of Pyrex dishes that were passed down by her grandmother. She wanted to add to her Pyrex collection, so she bought a rectangular bakeware dish just last month. Bolte said ...