STACKABLE BINS ORGANIZER MINI (https://www.thingiverse.com/thing:2684082 & https://www.thingiverse.com/thing:2562937) are a great series of mini boxes, however there is one drawback on these boxes the little male pins are getting broken quite easy and the boxes cannot be stacked anymore of covered.

This remix is a cover which can lock to a box even when all four pins are broken.