I've been using one of these wonderful water saving German made garden sprays for the last twenty three years, firstly on my yacht Sofia, on my liveaboard yacht Shoestring, then The Little Red Housetruck and for the last seven years on The Flying Tortoise.
It's used as a marvelously simple alternative to an electric bilge pump shower, requiring no electrics it can be filled with hot or cold water. Its effective nozzle delivers a good spray not just a mist and whatever use you put it to, it uses very little water. When you live in a small space, every tool or toy should have at least a couple of uses.
This not inexpensive gadget does much more than that.
I use it to rinse the dishes prior to washing them, for rinsing my hands, rinsing the sand from my feet after being on the beach, cleaning the windows and would you believe it, it's great for watering the garden...
