"Open Source Everything" keychain
OPEN SOURCE EVERYTHING!
Prepare the STL design file in your slicer and add a filament color change at the appropriate height. If you print with a layer height of 0.25 mm, the two topmost layers should be printed using white filament.
The O character acts as the hole for a keyring.
Originally published on https://github.com/BitBoxSwiss/open-source-everything