Little Giant Screw-On Poultry Waterer Base is designed for use with the screw-on waterer jar to provide smaller poultry animals such as small birds or baby chicks enough to drink. It is constructed of heavy-duty polystyrene which guarantees good quality and durability. Its screw-on design is easy to attach to let you provide a gravity-feeder to animals without any hassle. It is compatible with Little Giant 1-qt. Screw-On Feeder model no. 690 (sold separately). The base has a 1 qt. capacity and it measures 6 inches in diameter and 1.5 inches high.