A simple hanger that utilizes the open top shower cabin design to provide you with a place to safely hang your towel or clothes.

I printed it in PLA for that sleek black matte finish, but PETG or other rigid materials should work well.
Used 0.4 nozzle, 0.2 layer height, 5 walls, 25% gyroid infill and it's plenty strong.
You could even go solid infill or more walls to make it even stronger, but I think that's overkill.

Attached fusion file in case you want to tweak dimensions for yourself.