Behold the new Colgate Wisp, a disposable toothbrush for on the go hygiene. They're pretty much like the travel toothbrushes available in truck stops for ages, with the toothpaste inside the handle, but in a more attractive packaging complete with case. They're $8.50 plus shipping for a pack of 16 at Drugstore.com.
It's not like toothbrushes aren't travel-sized to begin with, but I could see myself using these if I'd forgotten my brush at home. They're better than the truck stop brushes in one way: the paste inside has more fluid, making water unnecessary (unless you wanted to rinse); worse in another: they're single use.
Make these biodegradable, Colgate, and we'll talk.