*I olso have an invention about a bong that you suck in normally and blow out through the same hole and the smoke comes out odorless. its olso cough proof so when you cough in it it locks shut.
*I have another idea where the stem lights the bud on its own. The screen inside heats up red hot from conduction and can be controlled by a button on the side. i invented this as to get no gas flavor while smoking marijuana with lighters. Enjoy the FLAVOR