These large-capacity Automatic Poultry Waterers features a vacuum-sealing O-ring cap that creates an automatic water flow. 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 is a durable unit that will stand up to plenty of use. Available in 3 gallon, 5 gallon and 7 gallon models.