YouTube - Broadcast Yourself.= Check this out. Has got to be the best bong out there. Works like a gravity bong but it filters the smoke through water first so it's no were near as harsh. The one I made I melted a bowl into a 2 liter cap and epoxied a piece of 1/2 copper pipe to the underside of the cap. As for the bottle I just drilled like a 1/2" or so hole in the bottom of it and used a old tea pitcher to catch the water and to refil the bottle. If you havn't smoked from one of these yet your missing out cause with this thing I get stoned as hell off just a couple of bowls.