quality:corruption, structural:reformatting
Borosilicate glass

Borosilicate glass, which is typically 12–15% B O, 80% SiO, and 2% Al O, has a low coefficient of thermal expansion, giving it a good resistance to thermal shock. Schott AG 's "Duran" and Owens-Corning 's trademarked Pyrex are two major brand names for this glass, used both in laboratory glassware and in consumer cookware and bakeware, chiefly for this resistance.