Big for outdoor adventures, camping in the backcountry or filling up at brewpubs. The 945ml Earthwell Insulated Kewler flask with Bottle Opener cap keeps water iced up to 72 hours and hot drinks hot up to 20 hours. This Earthwell vacuum insulated travel flask can also be used as a growler to keep beer cold up to 32 hours. Topped with our patented and insulated Bottle Opener Cap, it opens beer bottles on the fly thanks to an integrated church key. It s also easy to transport thanks to a bottle leash with room for a two-finger carry. Prost!TempLock double wall vacuum insulation keeps drinks up to 72 hours iced, 32 hours cold, and 20 hours hotEarthwell Kewler Cap made with ThermaGrid waffle insulation to preserve your drink at optimal temperatureEarthwell EarthGrip powder coat finish is tactile, easy to grip, and extremely durable18/8 kitchen-grade electropolished stainless steel doesn't transfer flavour, no metal aftertasteBPA-free and phthalate-freeFits most backcountry water filtersDoes not sweatDishwasher safe (hand wash recommended)Leak free designCompatible with Kewler , Roaster and Roaster Loop capsPatentedLifetime warrantyVolume: 945mm (32oz)Mouth Diameter: 45mm (2.12")Diameter: 93mm (3.65")Height: 250mm (9.87")Weight: 440g (15.5 oz)