Oster Fresh Sips Less Stress Pet Fountain, 60 fl oz - Plus Package of Replacement Filters Oster Fresh Sips Less Stress Pet Fountain, 60 fl oz - Plus Package of Replacement Filters (Includes 4 Dual Filters) 60 fl oz capacity; perfect for small dogs and cats. Continuous flow means constant filtration, healthier and cleaner water for your small pet. Elevated base helps your pet drink comfortably. Includes a custom designed, replaceable double filtration system with sponge and charcoal filters that clean water and reduce impurities.