CONTINUOUS SUPPLY OF FILTERED WATER The Petmate Replendish Waterer provides pets with a delicious source of fresh, filtered water with less refills required for pet parents. For pet parents with busy lifestyles, this automatic water bowl for cats and dogs ensures pets have easy access to an extended supply of fresh water. EASY TO CLEAN For convenient refills and cleaning, the bottle is easy to unscrew from the bowl base of the dog and cat waterer. With an easily replaceable charcoal filter, this water bowl dispenser for cats and dogs allows your pet to continuously enjoy the refreshing taste of purified water. This Petmate water dispenser is available in four sizes, ranging from 1/2 gallon to 4 gallon capacities, for pets of any size and multi-pet homes.