The Little Giant Automatic Plastic Poultry Waterer features a vacuum-sealing O-ring cap that creates an automatic water flow. The waterer is made of dent-proof, heavy-duty translucent plastic that allows you to see the water level. The easy-to-fill jar snaps compactly onto the base, and the rugged handle makes transport around the yard easy. This durable unit will stand up to plenty of use. Holds 3-gallons.