If you really want to get your teeth super clean, you really need this extra large tank to finish off with.
Extended Capacity Water Tank with Bonus Nozzle
When I ordered the larger tank, I didn't realize how much I'd like it. I was optimistic. It's design is so clever: my hand comfortably fits "within" the tank contour. If/When I return to traveling, this will be what goes with me. Now I alternate nights between my portable Poseidon and my countertop water-flosser. P.S. My online Qs to and help from staff was much appreciated. Must be a super team!