I only use electric toothbrushes. I'm too ADD to brush regularly without the POWER of SCIENCE. When I travel, though I have trouble, because they don't normally make travel electric toothbrushes, or cases for them, or whatever, so that I can toss the toothbrush into my book bag and not get toothpaste residue on my calculator.
I recently bought a shiny new Crest toothbrush, and it came with a plastic cap to go on the toothbrush. Why hasn't anyone else done this before? It just snaps on to cover the bristles.