Air Tanks: PVC or Soda Bottles?

'''I don't want to use a plastic bottle as a power source, I'd rather use PVC. Is this a good idea?'''
 * PVC may seem sturdy but realistically it's dangerous. Some people have been able to charge it up to as high as 140psi. It is not recommended as a tank at all because an explosion WILL send fragments of PVC flying. Not only can you be hospitalised by these fragments. But the PVC (polyvynilchloride) will potentially give you blood poisoning.
 * In turn, a very bad idea.