Stainless steel, insulated, refillable, reusable-our 20 oz wide-mouth water bottle is the flask to grab to keep cold drinks cold and hot ones hot. The large opening makes it easy to add ice-and get yourself a bigger gulp. Fill up for adventure. Features: a TempShieldA(R) double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12 a Flex Cap is leakproof when closed a Honeycomb(TM) Insulated Cap for maximum temperature retention a Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer a Color Last(TM) powder coat is durable, sweat-free and colorful a Wide Mouth opening is ice-cube friendly a Bottle fits most backcountry water filters a BPA-Free a Dishwasher safe a Not for use on a stove, in a microwave or freezer Specificatons: a Product Diameter: 2.90" a Product Height: 10.60" a Product Weight: 0.77 lb