Quote Originally Posted by stinkyattic
No copper. No aluminum. Nothing that has been exposed to any solvents or hydrocarbons (fuel line parts are OUT).

I make my own pieces. I've never bought a bong for myself, only as gifts, and now I just MAKE the gift ones. Most headshops carry spare parts to repair or build smoking devices; go poke around and see if there is anything that catches your eye as being compatible with an item you already have laying around the house.
Ummm...most of the bowls you get for bongs and such in a head shop are aluminium, the rest are brass (Zinc and Copper).

Aluminium and copper are not bad things for bowls, and after they get a little resin coating on them....it won't matter anyway.