Originally Posted by troncarver

reverse gravity bong

create the screw top bowl for 2 liter like you would for a regular gravity bong

instead of cutting off the bottom half poke a hole the size of your finger near the bottom

plug the hole with your finger and fill the bottle with water

light the bowl and unplug the whole and let the water drain into sink and fill up 2 liter chamber of smoke

I like this better then the grav bong and this is my original idea so if its already on the internet someone stole it from me