Durable 18/8 Capacitor Stainless steel keeps drinks hot for up to 11 hours and cold for up to 31 hours AUTOSEAL button operated lid automatically seals between sips to eliminate spills and leaks Patented cross-bolt slide lock prevents the AUTOSEAL button from accidentally being pushed while on-the-go Drop Down lid feature for easy cleaning Protective spout cover to keep out dirt and germs Bolted carrying handle High flow rate spout Double wall vacuum insulated One-handed drinking Exclusive, patent-pending base design grips table tops and reduces clanking