Instead of throwing away your empty spools (from Bambou Lab), you can now use them as a sorting out system with drawers and a peripheral rail to keep the boxes in place & allow rotation/sliding. 

Note 1 : for the full system you need to print 3 drawers + 2 rails 

Note 2 : the rails must be glued on the edge of the spool as shown on the pictures. 

--> The second file called “spool tubes” allows you to pile up your spools on top of each other and create a tower of spools with drawers that can rotate on itself.