Timemore C2 travel cap (including tighter version)

This is a simple cap for the Timemore C2 coffee grinder.  So you can put it in your travel bag without spilling out coffee dust everywhere.

EDIT 2022/09/26

I added a new version which is tighter. As I noticed the previous version could get loose over time. This new version goes deeper in the grinder and gets locked in it after a small turn so it does not move anymore. Print with hole facing up.