This WF-180 Automatic Water Fountain has a large capacity of 2.3 liters (77.8 ounces), suitable for a variety of pet ages and multi-pet households. Its faucet & spring surge modes are designed to accommodate the drinking habits of cats, dogs and other pets, encouraging them to drink more. Offering an 80 ml emergency water storage design to help out in power outages or other accidents, the fountain has a round shape that won't hurt your cats, and a fully-transparent water tank to make cleaning & changing water easier. Crafted from high-quality, non-toxic and odorless PC PP material, with a simple quick-release structure for simple removal & cleaning, this fountain also uses a high-density, high-content activated carbon filter to maintain water quality & increase oxygen content.