This is the heart of the bong, a filter system that was designed by an industrial designer.
When air gets to the pipe opening, and enters the water tank, it cooles and then gets inhaled. When inhaled, the hot air travels to the filtering system that has foam on the inside and metal mesh on the outside.
Because all the joints are completely modular, you can clean or change the metal filter mesh, and change the foam filter after a while.
Sounds awesome, did you try kickstarter?
Not yet, as i want to connect with the right people here on steemit and see if it gets attention.