A hidden, U.L.-approved heating element keeps water above the freezing point and costs only pennies a day to run (Draws less power than a 30-watt light bulb). The 1-1/2 gallon bowl is constructed of high-density, weather-proof polyethylene. A special gnaw-proof wrap prevents your dog from damaging the cord and the non-tip design keeps him from knocking it over. Imported. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Bowls.