This rough and tumble stainless steel travel mug is great for long treks or long road tripsto the wilderness or across town. The Thermos Stainless King Travel Mug is an extremely durable vacuum insulated mug that holds both hot and cold beverages. Its a dependable, always-at-the-ready product that can be used all year long, in any kind of condition. Your hot drink stays hot while the mug exterior stays cool. The sealing DrinkLock lid is leak-proof, but make sure you double check that its closed.