Waaaaaaaaaay different. Water filtered, about 6oz water, 6oz chamber. The two pen tubes connect through the cap via a small hole in the cap. I just reconnected the top piece of the pen after I shortened it down enough to not be near the flame, set the socket on top. Normally fits snug around the little pen piece on top of the cap. If you know the black and white bic pens, you should know how the top piece has a fair amount of plastic going down into the pen tube. Like, the black part of the pen is way bigger than it looks before you take it apart. I would just fit the cap in between the white pen tube and the black top piece. Made the hole with a knife, corkscrew style, and made sure it was airtight by making it slightly smaller than it needed to be and just forcing the pen top through it.
The pen tube I would hit from'd be in a hole close to the top of the bottle, about 2-3in down and made airtight by melting a small hole and pushing through with a third empty pen tube. Carb/shotgun about 1in down from where I'd hit from on the opposite side, filled with water wherever you want underneath that. Like I said, I always preferred about half the bottle full. Smooth hits for something made out of some pretty hazardous shit to smoke out of, lol.
I'll make one this weekend and post a picture. I used to be so proud of the set-up in high school. Basically disposable, only took like 15min to make once I got the method down and, if I wanted, everything but the bottle was reuseable. I used to just take it all apart, throw the pieces in a ziplock and tuck it away in the bedroom somewhere until I needed to make another.
