This is my first attempt at designing for 3d printing. How hard can be a box be? By using Fusion 360 software with a little help from Adobe Illustrator for the lettering, I give you my take on a soap holder.

The tray is printed separate and is intended to be removable for help with cleaning. "soap" is designed as the grate for water runoff.

Final size from design:
Dish - 3.3in x 2.40in x 1.5 in
Dish inside - 3.1in x 2.2in x 1.4in
Tray - 3.08in x 2.18in x .2in
Tray risers (inside dish) - .6in from base, .8 from top

Designed to not need supports. Rafts are optional but with the lettering they are ideal.