thc is alcohol soulable so it would catch thc in it...tho i cannot tell you how much or if it would be worth it....i've smoked out of a water bong with a screwdriver in it...(vodka + orange juice) i didn't really get that high so i can guess alcohol catches a great deal of thc....if i were you i would use a very small water bong so you could use less alcohol therefore less to drink afterwards....