Petmate Replendish Waterers are great gravity waterers that provide your pet with a non-stop flow of water throughout the day. Replendish pet waterers feature Microban antimicrobial protection to prevent the growth of bacteria that can cause stains and odors, helping to keep your pets water cleaner, longer. Provides a continuous flow of water all day Base has Microban protection to prevent stain and odor causing bacteria Replaceable charcoal filter purifies water Water stays cleaner longer Made in the USA.