Come and see our amazing products. Double layer borosilicate material, insulated glass can withstand temperatures from -30C to 400C You can enjoy coffee, espresso, cappuccino or tea warmer for a long time. Use heat-resistant double layer glassware to keep fingers safe and cool and keep drinks warm without getting burned. 270ml or 9oz of gourmet coffee, milk, espresso, latte, hot or cold, or any beverage you can think of, these ultra-light, clear, double-layered mugs are the gift you cannot wait for. Pls confirm with us about the packing info, stock color and exact production time before placing your order.