how exactly do gravos use more weed? i smoke out of them every day, and i find it actually saves weed, because you dont need as much. you dont need much at all, just a small pinch
chillstoner420 Reviewed by chillstoner420 on . Whats the Diff. between bong and gravity bong?? hey, ive been smokin for a few years... but have only used homemade bongs... what is the (if any) difference from a bong and a gravity bong Rating: 5