Dont use pvc cos when this burns you're going to get poisonus gas forming.
Plus the bongs you buy are made from acrillic and the cone which heats up does'nt make contact with the acrillic.
mrxthethcman Reviewed by mrxthethcman on . Plastic Hey i was thinking of making a huge bong from PVC pipe. As you know it is plastic. But that part wouldnt get hot, so it doesnt matter right? Rating: 5