OK, perhaps a sorta dumb question, but... curious to as how folks that switch out their soaps store the used soaps? I have one of the two soaps I have been using in an Old Spice mug and the other in a short dish. I'd like to swap out and try other soaps I have lined up, waiting to be used. Do you place them in small tupperware-like cases, or in small zip lock bags? Or ? Thanks in advance!!