2. Ash Catchers
Ash catchers are a chamber that separates the bowl from the bong. This keeps ash from falling directly into your bong and potentially splashing up into your mouth. Most ash catchers have a built-in percolator for bongs that need a little extra cooling to balance out the harshness of a big rip.
Another benefit of ash catchers is they accumulate most of the tar and nastiness before your bong or body does. They’re smaller and easier to clean regularly than your whole bong so keeping hits fresh won’t be as much of a process with an ash catcher.