CF-203 is automatic supply feeder and waterer set with atural gravity supply system. No electricity required and can be used anywhere. It has large capacity which can last about 3-7 days according to pet size. You can rest assured to go on vacation, work, party, do not have to worry about pets will be hungry. It is easy to clean. You can rinse directly with water. The environmentally safe,non-toxic plastic is good your pet health.