Well, if you are serious about it just go to a tool and die company and have them mill you a downtube with a bowl on top.
Faultydesign Reviewed by Faultydesign on . Safe downtube for my GB invention Hey there, In my neverending quest to get as blowed as possible, a close like-minded companion of mine and I have invented a new device that blows away any bong or pipe we've ever hit (same goes for anyone that's tried it). It is a spin-off of a gravity bong. It is similar to the Blisset Bucket, though it has many many improvements over this design. We plan to patent it as soon as we have a viable prototype. Currently we have one in use (out back in the treehouse for serenity), but we do not Rating: 5