Earplug container

There is a further new version.
That is more compact.
https://www.thingiverse.com/thing:3871075

Earplug container
- Inner diameter 18 mm inner Length 60 mm
- Screw cap
- No support required
If it is a thing of the size which enters inside, the use by your idea.

2019/8/2 Design changes
- Changed the diameter of the lid 30mm to 27mm because the lid has felt big.
- Changed the height of the lid from 15mm to 10mm.
- Reviewed the contact surface of the lid and the case. Tightness is im