actually i think i change my answer, but not to a grav. if you use a GOOD vaporizer, i think it gets you the highest with the least product
haha i think the question about weed being a supository actually came up as a thread one time... fucking awesome i'd try it... not
meh, it may well work. not likely to be much more effective than eating, and even if it is i'm sure its not worth it.
It's a real close one between one hitters and gravity bongs. When I'm on the verge of being dry (like now), I exclusivly one hit that shit with my glass pipe and all it takes is hardly even .2 to be set for about an hour/hour and a half. When I'm with friends and I got weed to spare I love to pack huge grav bong hits and roach the shit out of my lungs.. but not often, 'cause it hurts
Thats how everyone does it round here.. the waterfall bong is the most widely used method at my school