Why Is Pyrex So Popular?

as a line of clear borosilicate glass used in the laboratory or in the kitchen. Its multifunctional use and ability to withstand a high heat made it incredibly popular for home cooks and universities alike. ... One day, she baked a small sponge cake in a sawed-off battery jar made from Pyrex that was used in the lab.

What is special about Pyrex glass?

Pyrex pieces used to be made of borosilicate glass, which is more resistant to breakage when subjected to extreme shifts in temperature. ... Although tempered glass can better withstand thermal shock than regular soda-lime glass can, it's not as resilient to such stress as borosilicate.

Is Pyrex as good as it used to be?

Cooking Light also calls out the fact that if you have vintage Pyrex glassware that's over 20 years old, it's a hot commodity. That old casserole dish is sufficiently heat-resistant (and thermal-shock proof) and will withstand even the most extreme temperature changes since it's of the original glass.