Gravity Waterer: The principle of physics automatically replenishes water, without electricity, 2.8L large capacity, worry-free going out, perfect for pet parents with busy lifestyles. Durable Design: PET and ABS. Ensuring reliable, everyday performance, the gravity pet feeder features a ABS top lid and base and a transparent PET food-storage hopper, which makes it easy to check food levels at a glance. Khmer fiber filter cotton: Dual filter system, high density, high water permeability, filter impurities between fibers, safe to use.Easy to Clean: The removable parts and wide-mouth design allow for easy access to effectively clean all the different components, inside and out. Recommend to wash once a week.