With my crutches a was always needing someone to serve bring my coffee outside… Now with this little cup holder I'm totally autonomous!!!
Of course I have to go slow, to not spread the coffee everywhere ;)
The uploaded stl is for a 22mm diameter rod. My coffee cup has a diameter of ~55mm.
As for the “Crutches hook helper clamp extension” the OpenScad file need the awesome library “GoPro customizable mounts, and a library to expand”. The v2 requires Parametric Locking Connectors library.
The author remixed this model.