The Aqua Buddy 2 quart waterer is just the right size for the home. The Aqua Buddy uses an internal float and valve system. When your pet drinks and the water level drops, the valve opens and replenishes the water supply. As the bowl refills, the float rises and closes the valve. This simple but effective system will not overflow, and no training is required for your pet to use it. Connects to any garden hose to provide consistent fresh water for your pets. Ideal for cats, dogs, and other outside animals.