Someone should invent a big salad-spinner-type contraption for the change rooms of public swimming pools into which you could drop your bathing suit and then crank the handle to spin the water out of the suit before you put it in your pack and take it home.
UPDATE: My FaceBook friends inform me that these things do exist--just not at the pool I go to. So... I still haven't seen my idea for a wasp sucker on sale anywhere (like a Dustbuster only with a long, narrow neck with a baffle in it, so that you can suck wasps off your steak at barbeques and dispose of them later). It's such a simple idea. I want one of those. I even sent the idea to Black and Decker -- nothing. Drawing available on request. The fat end where the wasps would accumulate during dinner could later be emptied into the bushes or sprayed full of Raid, depending on your views about wasps' right to life.