and for a pipe for smoking stuff just maybe use copper pipe, eh? I doubt that block you posted will cool the smoke much. Also I don't think pro cooling is the place for this but your right, it is cooling. I don't see a problem right now but other mods may.
EDIT: I just looked at your profile and you are listed as being 15. You know, in October the law changed from 16 to 18 so I would really like you to clean your post up
As long as this is for a friend of age and you stick to cooling (and not saying any drug related BS) I think it would be ok for this thread to live.