I would like a small cube, but not 2". I use a soap net bag, its the same type of nylon netting as bath poufs but you stick your soap inside and then its got a drawstring closure with a plastic piece to keep it closed. With bars of soap I actually cut them into thirds and place one into the bag. This makes the bag a better shape to use rubbing all over my body, plus I think its useful to help the soap last longer since the whole bar isn't getting wet everytime I use it.
Something like 1" cubes, say a set of 3 together of the same soap or different soaps would interest me. Its actually something I'm wanting to do when I get some cube molds.