A simple press to smush soap slivers into a useable bar. If you use bar soap you can end up with lots of little slivers of soap that aren't very useful. Just collect them, soak them briefly in hot water, put them into the smusher, and smush them into a single large bar of soap.

Print one outside and two insides (for top and bottom).

After printing this out to use, I decided it would be better if the outside was a bit taller and re-did the stl files.