Just out of curiousity why would a gravity bong be "cleaness"? The smoke isn't filtered through anything?. I would agree vaporizer to be the cleanest, as you don't actually burn anything to produce tar.
s8nlilhlpr Reviewed by s8nlilhlpr on . what is the cleaness way too smoke? What does everone think is the cleaness way to smoke weed? Im thinking a gravity bong.... Please tell me your answer!!! :D Rating: 5