The ReCharge AUTOSEAL Vacuum Insulated Stainless Steel Tumbler was built with ruggedness in mind but with attentive details to make the adventure even more fun. This double wall vacuum-insulated tumbler is engineered with an airless space in between two walls to eliminate temperature change and keeps drinks hot for up to 8 hours or cold for up to 24 hours. The celebrated AUTOSEAL lid automatically seals between drinks to eliminate spills and leaks, and the one-handed button operation makes on-the-go drinking a breeze. The built-in slide lock gives you reassurance the button will not accidentally engage, and the added spout cover keeps the drinking interface free of dirt and germs. A new and improved durable lid features a drop-down mechanism for easy cleaning and is dishwasher safe. What are you waiting for? Let the adventure begin!