AUTOMATIC: The cat and dog feeder uses gravity-feed technology, dispensing dry food as pets empty the bowl. EASY TO USE AND CLEAN: Simply open the top lid to fill food, while the waterer's reservoir can be removed directly from the non-slip base to be filled with water, then reattached to the base. For cleaning, the reservoirs can be detached from the base and rinsed with water. HIGH-QUALITY MATERIAL: Made of food-grade plastic, non-toxic, no foreign odor, strong and durable. LARGE CAPACITY: With a total of 3.8 liters, it can last about 7 days for small animals and more than 3 days for large animals. With the dispenser, you can go to work, to a party or on vacation knowing that your pet is well fed.