The GROWL'R is the perfect travel companion. Fits 64oz of your favorite beverage while the triple-insulation keeps it cold and carbonated for up to 48 hours. The BevGuard technology guarantees your drinks stay ice-cold and refreshing, without the metallic aftertaste other stainless steel products often have. So sip back and relax with your always cold and refreshing drink. The GROWL'R is also 100% brewery approved, so when you want something other than water, head to your local tap house and bring home 64oz of your favorite craft brew, and you can enjoy cold, crisp draught beer on the go. All weekend long.