I made this design over the weekend because i really needed something to store some stuff near the wall-mounted sink, so this is the only “table” i have at the sink atm.

Nevermind the warping in my model on the picture. I have faith you can do much better xD

The model leaves a 0.2mm gap between the modules of plate and shelf. Even if you struggle with that tolerance, you should be fine with just a little bit of violence, swiftly and repeatedly applied to the taller parts of the shelf.

You will either need pretty hefty walls around the hangers, and potentially add a solid block of material inside the plate behind the hangers.
I used curas support blockers and per-model-mesh settings to do so by adding 20 layers of bottom in those squares, as well as doubling the infill to 50%.
If you print it with basic 0.8mm walls and no other improvements, they will most likely snap from the weight of a wet towel.

There is both a fat and slim version. The fat version is significantly stronger, with an additional centimeter on the bottom of the shelf.