Keychain Box for Hearing Protection Earplugs

thingiverse

I hate noise and so I want to have my foam hearing protection earplugs handy at all times. This box lets me keep them attached to my keychain, and the design of the locking mechanism makes sure the box never opens on its own. If you use the box's contents frequently, I recommend to use a spring loaded hook (such as a small carabiner) to lock it (instead of a regular keyring as shown on the picture).