The tough and top-performing 51 oz. Perka Rover Stainless Steel Growler with Cup has a double wall stainless steel vacuum insulated construction that will keep your drink cold for 72 hours and hot for 30 hours. The lid has a handle for easy carrying and it doubles as a 12 oz. drinking mug. The lid/cup has an 18/8 stainless steel liner and durable polypropylene outer wall. The sweat-proof powder coated bottle finish provides a non-slip grip and durable protection from bumps and scrapes. This is sure to become your favorite companion for hiking, camping or any outdoor excursions. FDA compliant and BPA free. A portion of all proceeds is donated to Shelter to Soldier, a non-profit organization that rescues dogs to train as service animals for veterans in need.