My Ninja NJ100 chopper had the original non slip ring break and I hated the noise that the bare chopping bowl made so I quickly threw this together. It doesn't quite fit as nicely as the original one did but beats having to put the chopper on a kitchen towel or oven mitt. I would increase the Z- height before printing as it only has a few mm's of height.
The author marked this model as their own original creation.