This soap dish is a classic. You can change some parameters directly in Fusion360. The F3D file is included.

You can (and probably should) print the two parts with contrasting color for a better look.

Related work

I've also published a soap holder for shower rail.

Available parameters

If you need to increase the width and length of the model, remember to also increase the honeycomb_number as necessary.

Size and spacing of hexagonal holes are not modifiable (yet).