They waste little to no smoke so they are very efficient, they also get you baked. I can burn a waterfall so no smoke is wasted at all. Also good for minimising smell if you dont want someone to know you have smoked.
dean0000 Reviewed by dean0000 on . Efficiency of a waterfall? I just made a Sobe waterfall but since I don't have alot of magic green left, I want to use it sparingly. Is a waterfall an efficient way to smoke? Rating: 5