3 in 1 Design: Automatic drinking bottle, hideout base, and food container. This multifunctional design meets the diverse needs of hamsters. Suitable for hamsters, dwarf hamsters, mice, gerbils, and other small animals. Large Capacity: The water dispenser has a capacity of 120ml/4oz. This large capacity reduces the frequency of water changes and is easy to refill. High Quality Material: Made from non-toxic plastic and stainless steel. Durable and safe for small animals. Stable and Firm: The water bottle is steady and does not shake. Features a unique hollow design that provides a breathable hiding place for small pets. Softer Reminder: Tip 1: Leave some air at the top of the bottle; otherwise, water may not flow properly. Tip 2: Press the nozzle 56 times after refilling to release air and prevent leakage. Tip 3: Place the bottle flat against the bottom of the cage, not on bedding material like sawdust.