Bin to hold parts during assembly / disassembly and keep them from rolling away. Can be used for example, to hold all of the screws from an enclosure while accessing internal components. The inner sides are sloped inward in an attempt to avoid the parts butting up to the edge and being difficult to grasp with finger tips. I used PETG because it was loaded in my Ender 3 at the time and seems to work well.
The author marked this model as their own original creation.