A sturdy soap box which makes use of a fun curvy shape to create raised interior rails for the soap to sit on for quicker drying, and includes a strong built-in latch to help secure the case closed when you're ready to travel.  Three sizes are provided to accommodate bars of soap that are up to 28 mm thick (small), 34 mm thick (medium), or 40 mm thick (large).  All sizes will allow for a bar of soap that is up to 100 mm long and 65 mm wide.

This is a fully print-in-place design, and no supports are needed.  I had no trouble printing this using default settings on my Prusa using the regular print sheet, but note that this model requires decent bed adhesion to prevent the curvy shapes from coming loose during the first few layers of the print.  Also note that the small version will even fit on a smaller print bed (such as the Prusa Mini) if you rotate it by 40 degrees.  Happy travels!