Raised bubble-up cat fountains give your cats an elevated drinking area above the main fountain bowl. This makes it easy for longhair cats to drink without getting their fur wet. And that makes it easier for them to stay clean and keep you and your home clean. Many of our raised bubble-up fountains come with a ceramic insert which when in place creates a tranquil pool of water. Most of these fountains can be run absolutely silently or with slight water sounds. Those fountains with a relatively flat upper surface don’t need an insert.