Natural antibacterial properties of copper keep the bowl clean and sanitary. Polished copper will patina over time. Clean with hot, soapy water. Manufacturer's limited lifetime warranty. The Copper Pet Feeder with Iron Stand is one of the few dog bowls worthy of America's finest homes. The artistically handcrafted iron stand houses two handcrafted, solid copper pet bowls and is accented with a copper dog bone.. . . .