Pyrex

Trademark for borosilicate glass

Pyrex is a brand introduced by Corning Inc. in 1915, initially for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware. It was later expanded in the 1930s to include kitchenware products made of soda–lime glass and other materials.

This keyword could refer to multiple things. Here are some suggestions: