Let a rhino hold your clothes :)
 

Printing Recommendations: 0.2 mm layer hight, no additional supports needed, 
for a robust print choose 20+ % infill and 3 perimeters.

Tipp 1: The model comes with a hole to wall-mount it with a nail. 
If the surface is suitable (like a door), the hook can also be attached with power-strips.

For more similar designs shaped like an elephant or a hippo check out these links:

Elephant Hook

Hippo Hook
 

Happy Printing!
 

Remix Documentation:

I remixed this model in two different ways and so 2 files are attached:

Both are manually remeshed and optimizied regarding overhangs and print nicer than the original design:
 

One file comes with a model featuring a ittle shorter horn so it will print even better.
(both files can be printed without supports though)