INSULATED GLASSES: the double-walled coffee glass is designed to keep your drinks hotter for a longer period of time, all while ensuring that your hands remain cool and comfortable. STACKABLE DESIGN: these stackable coffee cups are designed for easy storage, so theyll take up less space in the cupboard.. LIGHTWEIGHT GLASSES: made of high-quality borosilicate glass, these coffee cups are perfect for everyday use. DISHWASHER-SAFE: its easy to keep these espresso glasses clean, as they can be popped into the dishwasher. La Cafetiere Siene Double Walled Glass Espresso Coffee Cups, Set of 2, 100ml in Clear