These two walls of borosilicate glass create an insulating layer of air. This double-wall feature allows your morning beverage to stay hot and delicious, and the glass always feels cool. These double-walled and insulated borosilicate glass pieces are heat-resistant and microwave-safe. Perfect for all drinks like cappuccino, coffee, tea, latte, and espresso. * Machine Made * Imported * Material: Borosilicate * Color: Clear Overall Dimensions * 3.80"L x 5.25"W x 4.55"H * 16.5oz General Care * Dishwasher Safe * Hand-Wash Recommended