The top and bottom round black things are the plastic tops from Malibu 12 volt walkway lights, the middle part is a section of those drain pipe extenders (from Lowe's-- that you put on the end of your house drainpipes to direct the water away from the house), the small white knobs on top are the screw caps that come off of Glade air freshener refills (that go in the wall plug-in things).
"A witch from Canada"made some similar to mine using the bottom sections of a toilet plunger.