I just made a new PVC bong. The materials only cost me about $10. Its a very simple design but it hits hard. I think the reason it hits so hard is because you can't see inside the chamber and can't anticipate the amount of smoke you're about to inhale. So I tend to inhale more than I usually would and it is alot more than I'm used to. Well Anyways I will post pictures of it when I'm less blazed, because I cannot remember how right now. Has anyone else used PVC before? I know most people say not to because of the toxic gases when PVC is burned but I made the bowl and stem out of metal and the smoke doesn't actually touch the PVC until it has cooled down alot.