Thumb Drive Organizer

My cluttered desk has been improved by placing these several thumb drives Into a holder. The vertical configuration reduces their foot print a little. And I know when one goes missing. 
 

Half way through the print, the orange filament ran out. There seems to be no software in the Mini Prusa slicer that addresses this issue, so I pushed the new brown filament in the tube as the orange ran out.  That worked. 

Although not a tray, I would argue this provides a solution to the contest objective.