This 1 hole energy-free waterer bowl provides a sturdy drinking environment for your livestock to access fresh water. The 100 percent polyethylene construction makes the stock waterer optimally durable and weather resistant. Polyurethane insulation prevents water from both freezing and warming. Rounded corners ensure livestock safety and a patented door closure system prevents contamination from birds and insects. This waterer bowl has an ample 17 gallon(64L) capacity.