Print, latch, and pile as high as you like!

The box and lid allow you to connect multiple boxes to each other and close the top box with a lid.

Print the box and lid in whatever material you like. The latches should be printed with a somewhat flexible material — I recommend PETG.

Use supports for the walls of the box (the bottom has has small recess that should be bridged and NOT supported), and print the latch in the orientation provided in the files (with supports!).