The Thermos Stainless Steel Vacuum Insulated Steel Mug is designed to keep your beverages at the optimal temperature for extended periods. Utilizing Thermos vacuum insulation technology, it can keep hot drinks hot for up to 7 hours and cold drinks cold for up to 18 hours. The durable 18/8 stainless steel construction ensures reliability and longevity, making it perfect for long treks, road trips, or daily commutes. The exterior remains cool to the touch with hot beverages and sweat-proof with cold drinks. The Drinklock sealing lid provides a leak-proof seal, and the built-in tea hook accommodates tea bags or loose leaf infusers. The mug is dishwasher safe, with top rack placement recommended.