A .3mf file is supplied. The 3 files must be separated by the slicer. Print the tray part flat to bed (obvs), print the large lid on the flat edge that meets the tray section end (the other end is rounded, not suitable for bed adhesion). Print the small lid upside down.
This is a dense sturdy box and will use a fair amount of filament. I recommend 3 perimeters and ~20% infill. No supports required.
The author marked this model as their own original creation.