Kinu Cap
thingiverse
It requires support everywhere. So please remove the support carefully. The tolerance is very tight so it may not work for your printer. You can add tape at the end so the cap doesn't rotate while grinding.
Download Model from thingiverse
With this file you will be able to print Kinu Cap with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Kinu Cap.