All-in-one travel toothbrush
How many times have you gone away and brought your toothbrush only to realize that you have forgotten your toothpaste? My idea is a toothbrush in which a tube of toothpaste is actually attached to the handle so that you never have one without the other. The toothpaste would come out of the head of the toothbrush with a pump/squeezing action distributing the perfect amount of paste every time. You wouldn't need to have a full size tube, just enough to use until you throw out the toothbrush. Maybe I'm being a bit ambitious, but surely some sort of floss dispenser can be attached to the bottom of the handle.
Reward: Free toothbrush combo