Come and see our amazing products. Double-walled, borosilicate material, the thermal mug can withstand temperatures from -4 Fahrenheit degree to 302 Fahrenheit degree. Keep your fingers safe and cool with heat-resistant and double-walled glassware, so drinks stay warm and you don't get burned. It's more heat resistant, transparent, thinner and lighter weight, yet more durable than regular glass. It's dishwasher and microware safe. You can also customize the logo and size. Pls confirm with us about the packing info, stock color and exact production time before placing your order.