Simple S-shaped hook for hanging this in the shower etc. Attached STL is intended for 16.5 mm rods and has a thickness of 8mm. 

Print instructions:

• Use at least 4-5 walls
• PLA is okayish, but PETG is better

By modifying the attached Onshape design you can fully adjust the hook

• Diameter (default 16.5mm)
• Inner distance (default 40mm)
• Thickness (default 8mm)
• Height (default 8mm)
• Chamfer (default 0.8mm)

Onshape document (parametric): 

[https://cad.onshape.com/documents/8b22c84479bc4909248582ee/w/8d65c86cf3a8245528abdf00/e/59824ff697aed85e80a74cc1?renderMode=0&rightPanel=variableTablePanel&uiState=6606d57ec22e797a624242a1](https://cad.onshape.com/documents/8b22c84479bc4909248582ee/w/8d65c86cf3a8245528abdf00/e/59824ff697aed85e80a74cc1?renderMode=0&rightPanel=variableTablePanel&uiState=6606d57ec22e797a624242a1)