Assembly sorting tray

When I disassemble something to either repair or improve it, screws, nuts and bolts start to pile up on the table (or on the floor) very soon. I tried using plastic cups but they are not only quite small but also don't have separation for different kind of fasteners. So I quickly put together that box and printed a couple of them, since project can get stuck in disassembled state while I'm waiting for printer to finish printing important improvement.