Large-capacity heavy-duty dent-proof drinkers from Little Giant, USA. These drinkers are easy to carry when full, with the big easy-grip cap handle. The cap screws securely onto the container with a large-section thread, and seals on an o-ring. A small screw-on cap is located on the container side, but is screwed on to the water outlet to stop leakage when the unit is being carried and filled. The container snaps into the plastic base. Spares kit has seals and side cap.