The feeder has been designed to prevent any debris from entering. The water swirl, in addition to keeping the water moving and fresh, also cleans the walls of the feeder, so you don't have to clean it every time you fill it up.
The water in the feeder remains clean because the device sets the liquid in motion and automatically passes it through multiple layers of special filters that remove bacteria and dirt particles. The device can also be easily disassembled into parts and clean each of them