This soap dish was designed with two things in mind - function and aesthetics. I wanted a print that would not have the stair-stepping on the inner slopes, where water is retained, and consequently microbial growth is promoted (bacteria and mold), but could not find one, so I made my own. The key is the right geometry and printing orientation, so no sloped surfaces are printed vertically. The inner base is sloped towards the drain, so this model is as sanitary as possible for a 3D print.

There are two base designs, which can be used with or without an insert - one that has edges flush with inserts and one that has raised edges.

There are also two optional inserts, a hexagonal / honeycomb design and a voronoi design, which are primarily for aesthetics (not functionally necessary).

Make sure to choose the desired plates to print.

For cleanest prints use PLA.

PETG is also an option, more challenging to print perfect but its good for such purposes as it usually has better layer adhesion (smaller ridges between layers). For PETG I would recommend the following changes in filament: nozzle temps in the lower PETG range (230 - 240 depending on your filament) and cooling instead of heating makes a difference if you have an enclosed printer (you need to change the softening temp in filament to 49C or less for that to kick in if using a Bamboo printer). It is essential that PETG cools down fast enough on edges (before next layer) to prevent droop.