Specification: Material: High-borosilicate Glass Size (L x W x H): 6 x 5.5cm or 2.36 "x 2.17" Color: transparent Heat resistance: -15°C-150°C (expansion coefficient 3.3) Features: x 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. x 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. x 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! x For 3.4 ounce or 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. x The size of the espresso cup is 2.16 x 2.36 inches or 5.5 x 6 cm, which is an ideal size. You can use it for coffee or alcohol, suitable for many occasions. Package Includes: 1 x Shot Glass Notes: 1. 1 inch = 2.54 cm 2. Please allow 2-3cm error due to manual measurement. Please make sure you do not mind before purchasing. 3. Color may not appear as exactly as in real life due to variations between the computer monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.