CHEFS Glass Measuring Set, 2 Pieces Flameproof, laboratory-quality borosilicate glass is safe to use on the stove top Heat-, microwave- and oven-safe to 500 F Dishwasher-safe Produced in the USA with imported materials CHEFS signature collection of professional-quality cookware, kitchen tools, bakeware, dinnerware and more -- available only at CHEFS Catalog