Avex Recharge Autoseal Stainless Steel Tumbler Auto Seal button operated lid automatically seals between Sips to eliminate spills and leaks Drop-down mechanism underneath the lid for easy cleaning Protective spout cover to keep out dirt and germs Slide lock prevents the auto Seal button from accidentally being pushed while on-the-go Vacuum-insulation keeps beverages hot for up to 7 hours or cold for up to 17 hours