NOTE: USE A LIGHTER OR BLOWTORCH TO SOFTEN THE ADAPTER SO IT CAN EASILY SNAP ON THE CRUTCH.

The gap is done smaller, because in first iteration with bigger gap snapping mechanism broke after some time.

here is the quick remix of anti spill cup holder!

I recently broke my leg and had to use crutches to walk. It was a tedious task to walk and not to spill water cup. I found this cup holder and made small adapter for my 20mm stick. It has a knob that can fit into premade holes on the crutch or just ignore it and move as high as possible along the base.

It is just quick draft model, I will make update for it later. It does the job done so I'm happy with it.