Use the PVC and drill a hole at the top closer to the bottom, get a drill bit( or whatever you use to make a bowl) and a screen and then you should have the PVC pipe with a bowl on top, then just cover your hand over one side of the PVC pipe and hit from the other, remove your hand from one side of the pipe to clear it. You only need a screen if the hole at the bottom is to big. It'll work, i used to use toilet paper rolls with the top of a metal pen at the top...I was pathetic.lol