The feet on my stool started breaking off one by one so I decided to make my own. These little end caps slide right over the legs. I printed them out of Overture TPU. Gives just a little squish, but not enough to make the stool unstable. I've had them on there for about a year now. And the stools sit in my garage, temperature hasn't messed with them.
The author marked this model as their own original creation.