Description Material: The double-wall vacuum insulation made of high quality professional grade 304 double-layered stainless steel, durable and prevents the increase of bacteria, also keeps drinks odor free. . Appearance: The coffee thermos mug is easy to hold with non-slip environmentally-friendly scrub material. You also dont worry about the outer surface being easily scratched and cleaned. . Insulation: It is designed to make sure your hot and cold drinks stay at the perfect temperature for 68 hours. The double vacuum stainless steel insulation ensures that temperatures are maintained. . Function: When you are driving, in office or at home, if the reusable coffee cup topples on the floor, it will not spill or leak out. The lid will remain tight. . Guarantee: If you have any question about the products, you can contact us at any time. We will help you solve the problem on time. We hope you have a pleasant shopping experience. .