Hint for printing: Use some kind of support for the flat surface on the inside of the cap - at least around the hole in the center. Else the hole will not come out clean (main tunnel for the grease).
The author remixed this model.
This remix is customized for “NIGRIN Mehrzweck-Fett - 250ml”, but it may also fit other “toothpaste style tubes of grease” with a cap thread of about 20mm diameter.