Three pieces of plastic pipe. These here are about 4" long by 1 1/2".
Cut two down the length and slide them over the each other. The middle one has finger grip made with a lighter! Slide them in/out of each other to the length you need.
(http://img.photobucket.com/albums/v299/Kenkew/Pot01.jpg)
(http://img.photobucket.com/albums/v299/Kenkew/Pot03.jpg)
(http://img.photobucket.com/albums/v299/Kenkew/Pot06.jpg)