Specification: Material: High-borosilicate Glass Size (L * W * H): 6 * 5.5cm / 2.36 "* 2.17" Color: transparent Process: Hand-made Capacity: 100ml Heat resistance: -15°C-150°C (expansion coefficient 3.3) 2 Styles to Choose: A / B Package Includes: 1 * Shot Glass Borosilicate material, Insulated glasses can withstand temperatures ranging from 15℃ to 150℃. You can enjoy your cup of coffee, espresso, cappuccino or tea warmer longer. Keep your fingers safe and cool with heat resistant and double wall glassware, so beverages stay warm without you getting burnt! The outside surface always feels comfortable in hand. Shatterproof, scratch resistant, durable and safe for microwave and dishwasher! Borosilicate glass is the material you want when dealing with any glassware for best results! For 3.4 ounce / 100 ml of coffee, milk, espresso, wine, juice, wine, latte, hot and cold, or just about any drink you can think of, these ultra light, clear double-wall mugs are the present you just can't wait to give. The size of the espresso cup is 2.16 x 2.36 inches / 5.5 x 6 cm, which is an ideal size. You can use it for coffee or alcohol, suitable for many occasions.