I wish there I could find a form fitting sturdy bag that one could soak in as a minimal water usage bathtub, that you can stand up in. Even at home, if you only have a shower, and no tub, that would be very nice. Ideally you should be able to tie ropes or straps around it, or it should be surrounded by something stretchy, so you maybe only need a gallon or less of warm water.
Anyone know of such a thing?
I did find a bunch of folding and inflatable tubs that you can kneel in online - but they take more water that what I imagine, and various reviews say they often leak, and spill water all over the place.