Hi!
This is my Customizable hook for all purposes.
You can open the Fusion360 file and change the parameters for your own need!
Mine was printed for a squeegee, but you can also make them for a towel, or whatever fits your needs!
I printed mine without supports, as the diameter was big enough.
You can print them in whatever material you like, its all up to you :).
In the 3mf file I made use of the adaptive layer lines, to make the hook look even nicer.
I suggest you do the same for the parts where the radius turns into the straight piece.
For the squeegee holder 30 % infill was more then enough, but you could use more if it suits you.
I printed mine in PLA first to check the fit, and then in ASA for using it in the bathroom.