Update 2024-07-28
Maybe check the new version with hexagon/honeycomb top (and also a new photo of the cats ;)) here:
https://www.printables.com/model/453875-cat-grass-planter
Update 2022-02-13:
I added a new version of this two part cat grass planter.
Now with screw top for a safe connection and reduced height.
The files for this are named "New_GrassTop.stl" and "New_GrassBottom.stl".
The pictures with the green/gray cat grass planter are showing the new version.
- diameter size 13.75cm
- height (put together) 2.1cm