FORLIFE Glass Teacup, 12 oz., Clear, Set of 4 This cup is made from lead-free, heat resistant borosilicate glass. Remarkably durable, it is compatible with microwave and dishwasher, making it the ideal drink ware for hot and cold beverage. A lovely set of 4 - 12oz Borocilicate Glass Teacups, lets you enjoy the color of your tea! Thermal shock resistant up to 120 DegreeC/248 DegreeF Pefect for everyday use or special occasions