Because I lose tubes of chapstick faster than I can buy them.
Update
People seemed to be having trouble printing this, so I've added "version 2" which should fix those issues. The entire cap is slightly larger, the keyring hole is much more solid, and the top of the cap is now flush with the keyring hole so it can be printed flat.
| chapstick_keychain_cap.stl |
| chapstick_keychain_cap_v2.stl |
