Here is a system to store filament that is 100% 3d printable. NO HARDWARE REQUIRED!
Most of what you see to build this is being provided here. You can build a complete system using what is provided.
However, additional options are available on my Ponderings3d Patreon.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.