this model is a pair of balls you can hang from your Christmas tree.
the original model was found in the following link, though it was not in a 3d printable format, so I converted it, and made it a solid model.
https://sketchfab.com/3d-models/truck-nutz-7c65a8fc1bc847fdbd4438dae17bc7d0
the model labeled “solid balls” is the exact model from the sketchfab website, just converted into stl and made solid.
The model labeled “Flatish bottomed balls” is the same model with a slice taken from the bottom to make it more easily printed.
The author marked this model as their own original creation.