I'm putting this out there more for the record than serious consideration. There's a new water-type canister out. At least it's new to me. It's produced by a manufacturer called the Librex Group. I sort of took it for granted that Rainbow reigned in that area of the vacuum market but the Ritello along with RoboClean, Delphin, Big Power, Hyla, etc., is vying for a spot among the competition.
The Ritello's motor is claimed to be made in Italy and the housing design was done in Germany. It looks like nothing I've ever seen but they claim the lighted display panel is the first of its kind. However, I think there's a display on top of the RoboClean. The Ritello's plus point is that it has a cord reel.
In any event, this example of design gone wild can be viewed by way of the following URL -- http://librexgroup.com/ritello.htm
Have a good 'un,