AVEX FreeFlow Stainless Autoseal Water Bottle Durable 18/8 Capacitor Stainless steel keeps drinks hot for up to 10 hours and cold for up to 29 hours AUTOSEAL button operated lid automatically seals between sips to eliminate spills and leaks Patented cross-bolt lock prevents the AUTOSEAL button from accidentally being pushed for safe transport Drop Down lid feature for easy cleaning Protective spout cover to keep out dirt and germs