one of these http://oralbreeze.com/oralbreeze-redibreeze.html
I got the redi breeze but in hindsight I think I'd go for the quick breeze instead only because i could remove it when I don't want the tube hanging around but the areorator in the redibreeze is top shelf stuff and really give a nice areation to the water.
It's better than a Teledyne water pik because it's made out of brass and alunimun (no flimsy plastic or bacteria breading tank) it runs off the faucet so you can taylor your water temp and pressure. It blasts stuff away pretty good...quality made in US of A and the folks send you a PDF of instructions as a suplement to the cd rom it comes with.
All in all a 5 star product.