If you ever want to up class up your bongs prescription pill bottles make great secondary chambers that clean easily , are airtight and can be drilled to the correct size for tubing, and while you have some tubing you can cram a circular obstruction at one end, poke holes with a hot paperclip and clean out the crud. I haven't tried it yet, but I don't see why you couldn't seal the end of one side using wax paper and an iron. Sometimes the tubing is too small so use hot water on the tubing and maybe a little soap to get it on. When you want to take it off just use more hot water and soap. I used a percolator and a second chamber on my light saber bong, which clears by collapsing the bottom half.

If you choose to make a lightsaber bong, I recommend you cut off the top and pour a little elmers glue in there and make sure it gets into all the tiny crevices. I used electrical tape applied at an angle to wedge in the plastic hole and get a good seal. The top and bottom two halves can be stretched extra to provide more support/volume, this is also accomplished using hot water. Just enjoyed a bowl and it smokes beautifully.

Pics, of course:
http://img.photobucket.com/albums/v237/bangthedrumslowly/163844.jpg

http://img.photobucket.com/albums/v237/bangthedrumslowly/163642.jpg