Double-layer Vacuum Stainless Steel Insulation: Hot drinks keep warm and cold drinks stay cold for up to 6 hours. Leak-proof: The travel coffee mug comes with leak proof lid locks in tightly to prevent any accidental leaks or spills, the exterior will not burn your hands or cause any discomfort. Food Grade 304 Stainless Steel: Easy to clean and prevent the breeding of bacteria. Easy To Grip: The Matte finish and dented sides makes for a comfortable hold and good grip. One Button Opening: Effortlessly enjoy your drink with one hand operation. The small hole is for smooth drink flowing. Anti-skid Silicone Padding: The soft and wear-resistant pad helps to ensure stable placement at any places. Specification: Item Name: Thermos Coffee Mug