Creo SmartGlass Cookware, 4-Cookware, Piece Nesting Bowl Set, Oven Safe and for Serving, Mediterranean Blue SmartGlass means a unique combination of tempered borosilicate glass interior and ceramic exterior Heat resistant to 450F/232C and highly resistant to thermal shock Nonreactive materials ensure consistent cooking, unlike most metal bakeware Set of 4 nesting bowls: 1.1qt, 1.6qt, 2.6qt, 4.2qt Oven, microwave, freezer, and dishwasher safe