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Earthwell Kewler  Double Walled Flask with Bottle Opener Cap (945ml) for Hot Coffe and Cold Drinks - Aqua Blue
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Earthwell Vacuum Insulated Roaster Loop Cap lid side view
Earthwell  Roaster Loop Cap lid for Travel Mugs
Earthwell Roaster Loop Cap lid for Travel Mugs and Flasks – back view

Kewler™ – Insulated Travel Flask with Bottle Opener Cap (945ml)

Regular price £44.95

Big for outdoor adventures, camping in the backcountry or filling up at brewpubs. Our 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 hot
  • Earthwell Kewler™ Cap made with ThermaGrid™ waffle insulation to preserve your drink at optimal temperature
  • Earthwell EarthGrip™ powder coat finish is tactile, easy to grip, and extremely durable
  • 18/8 kitchen-grade electropolished stainless steel doesn't transfer flavor, no metal aftertaste
  • BPA-free and phthalate-free
  • Fits most backcountry water filters
  • Does not sweat
  • Dishwasher safe (hand wash recommended)
  • Leak free design
  • Compatible with Kewler™, Roaster™ and Roaster™ Loop caps
  • Patented
  • Lifetime warranty


  • Volume: 945mm (32oz)
  • Mouth Diameter: 45mm (2.12")
  • Diameter: 93mm (3.65")
  • Height: 250mm (9.87")
  • Weight: 440g (15.5 oz)

Kewler Opener

With Bottle Opener Cap