Learning CAD exercise, inspired by a daily-life problem many other people have, if we look at the variety of solutions here related to that (200-800 projects).
The 1st version broke after 1 month, as expected for this geometry and print orientation.
The 2nd version take that constraint in account, the band shape being more robust and aesthetic (probably kid-proof this time). It is based on Siedi's concept, with two little improvements (hexagonal holes instead of circles and the spikes are closer to the 45° rule).
Here is the FreeCAD tutorial