A cool new gadget that is just in the market is OHSO. OHSO is the ultimate travel toothbrush combining style and functionality:

OHSO is Self-Dispensing. Toothpaste is stored in the handle for safekeeping. The window shows you how much paste is in the chamber. OHSO uses suction to pull the paste into the handle for no mess refilling. so it is easily refillable. More over one can fill OHSO with their favourite toothpaste.OHSO will not leak. The bristles when worn out can be easily replaced. The OHSO Travel Brush cap doubles as a rinsing cup.

If you are interested in knowing how this product works, just visit OHSO