Features: 1. COFFEE MUGS: High borosilicate glass material, can withstand sudden temperature differences, -20~150 temperature difference without pressure, can be put in the refrigerator, or poured in just boiled hot water. 2. UNIQUE DOUBLE WALLED GLASSES DESIGN: Keep your fingers safe and cool with heat-resistant and double-wall glassware, so beverages stay warm without you getting burnt, and the outside surface always feels comfortable in hand. 3. APPLICABLE: The coffee cup is suitable for milk, espresso, latte, hot and cold, or just about any drink you can think of, etc. 4. AN IDEAL GIFT: These double-layer glass cups could be the ideal gift for your family or friends, especially on special occasions such as birthdays, housewarmings, weddings, parties, Mothers Day, etc. 5. EASY TO CLEAN: You can reheat in the microwave or if you want to drink a cold beverage, safe in the freezer. It is also dishwasher safe but recommend for washing by hand. Specification: Material: High Borosilicate Glass Color: Transparent Capacity: 300ml Product Size: 5.5 x 11 x 8cm Product Weight: 120g Package Included: 1 x Double Wall Coffee Mug