How do you  make a pvc bong?
 The first step is to use the razor to cut the bottom off the plastic Silo cup. This is hot glued to the bottom of the 1 1/2 pipe. This forms the base of the bong.Next, use your power drill to drill a hole in the 1 1/2 piece of pipe large enough to insert the 1/2 section of pipe snugly.Care must be taken to insure that hole is drilled at an angle so the stem and extends out and up from the bong at a 45 degree angle for the bowl to rest in. 