I dont know if this is what you mean or not.........
I used to live in a tweeker pad. The guys that were there tended to take on hobbies. Weaving hemp, sewing (they went to the sewing store and bought a machine). And finally settled on shit pipes. The O. Chem major would go to the lab and bring back test tubes. The ends were heated via butane torch from Home Depot and air was blown into the tube until a bubble formed, which was popped. Hence the shit pipe. Here is the part that I found interesting. After any said week of binge the O. Chem guy would use a small amount of ether to clean the residue out of all the pipes , this he would evaporate to produce glass….which is evidently considerably cleaner than street shit or ice……I never tried it because…..I guess everyone draws the line somewhere.
**note** on more than one occasion, said overzealous shit pipe blower would “pop” the bubble at the end of the tube, or drop the tube mid blow…….little blobs of hot glass melted carpet, burned eyelashes, etc…it was a pretty dangerous thing to do in a living room.
Two are in re-hab…..one is in jail………what fun.