The replacement ceramic filter for the innovative Auto Dog Pure Mug portable water bottle ensures clean water for your four-legged friend wherever you go! Featuring UltraCeram elecropositive technology, the filter attracts and retains 99.999% of bacteria, viruses, cysts and other pathogens, allowing you to use any water source available to quench your dog's thirst on the go. Filter is made in the USA, certified by third-party testing and purifies up to 50 gallons. Fits the Highwave AutoDogMug Pure portable water bottle for dogs.