Filament spool holder from a used whiteboard marker

Note: chances are small that you have collected the same type of trash as I have got, so the presented thing might be only useful as an initial idea of your own spool holder design to enrich thingiverse with your own idea, in addition to hundreds of other spool holder designs available there.

At least once a month my chief is very unhappy. He arrives for about a week to our office to interchange the ideas and resolve the issues, and he is really upset if a whiteboard marker doesn't give him