Combines fun with refreshment. Quenches dog's thirst while playing. Keeps canines cool in warm weather. Absorbs water that is gradually reduced. Freezable for long-lasting refreshment. The ultimate chew and fetch toy for your pet. The molded rubber ball has a foam core which absorbs and holds liquid. You soak the Hydro Ball in water, and it then releases the water through specially designed holes as it's chewed on by your pet. It's the perfect way to quench your dog's thirst as they play.