Quote Originally Posted by D1me
Surprisingly, the unfiltered joint outperformed all devices except the vaporizers, with a ratio of about 1 part cannabinoids to 13 parts tar. This disturbingly poor ratio may be explained by the low potency of the NIDA-supplied marijuana used in the study, which was around 2.3%.

Disappointingly, waterpipes performed uniformly worse than the unfiltered joint. The least bad waterpipe, the bong, produced 30% more tar per cannabinoids than the unfiltered joint. Ironically, the pipe with the electric mixer scored by far the worst of any device. This suggests that water filtration is actually counterproductive, apparently because water tends to absorb THC more readily than noxious tars. Like the waterpipes, the cigarette filter also performed worse than the unfiltered joint, by about 30%. Researchers speculate this is because cannabinoids are exceptionally sticky and adhere to other solids. Hence, any filtration system that picks up particulates is likely also to screen out cannabinoids.




source- http://www.ukcia.org/research/pipes.htm

if you havn't smoke out your brains out, id reccomend reading this. will really make you reconsider water pieces. i think that a chillum gives you the best "high per weed" but that's just me.
good info man...

for some reason i like sticking to pipes and joints more than waterpipes because the high seems a little more chill. whenever a bong is around im usually with a lot of people which makes me kinda tense, and then you have to worry about dropping it, spilling it, sucking in the bowl, and shit that keeps my high from being completely care-free.