That would cost a shitload just for a homemade bong/pipe (assuming you buy the instrument). Im a stoner and a member of the school marching band, so i too have thought about this. A bassoon has the potential to be made into a bong, as well as a bass clarinet. as for the brass family, try a trumpet. pack the bud in the mouth peice and try and inhale through the horn, it might work.