I have an in-wall nook in my shower for shampoo & soap, but since the nook faces the shower head any soap quickly develops a slimy goo underneath it. This soap dish fixes the problem.
This soap dish fits inside the nook, but is angled so most of the water exits the shower rather than getting caught. In addition, there's a hole in the rear so you can add something heavy and flat (like pennies) to add extra weight to keep the soap dish in place.
I'd recommend printing it in some plastic that can be vapor-smoothed, like PolySmooth or ABS. I've used both successfully. This example was printed with PolySmooth.
The author marked this model as their own original creation. Imported from Thingiverse.