I like this idea! Just a thought, but rather than making the soap holding rectangle continuous, you could just do the 4 corners. This way, if water drips over the sides of the bar, it won't be trapped in the small rectangle where it can't evaporate, and will turn the bottom of the bar to mush. Just doing the 4 corners will keep the soap from moving during loading, but will allow the water to flow out into the larger rectangle for evaporation. Just a thought, and I wouldn't claim that's a good one.So as a result of my testing, I was thinking to embed the Mogno Box bottom tray design into a larger box so it will act as a lather bowl and catch all the extra stuff that flails over the side, etc. I will make a lid for this as well to keep the soap fresh. What do you guys think of this design?