Yeah what makes a bong a bong is how the smoke passes through water in the form of bubbles and concentrates into a small-volume, super-potent cloud in the chamber. Very efficient way to puff because you don't have a thin current of smoke continually chafing your throat. Instead it's one compact dose injected quickly into the lungs. As far as I know it's ultimately the best way to burn. If I was stranded on a desolate island I would make sure to have a bong with me. As the adage goes "with a bong, the only thing wasted is you."