Revol Grands Classiques Collection, 3-1/4-Inch Mug 23-1/4-Inch Mug to 3 1/4 Inch Mug Porcelain; designed for intensive cook-and-serve use; inspired by French Culinary Ware White in color; designed to be accessible to all, but are especially favored by our greatest chefs-they are designed for intensive cook and serve use Oven safe to 572 degrees Fahrenheit; microwave safe; freezer safe to 4 degrees Fahrenheit; dishwasher safe Making the culinary elite accessable to the everyday home