Safety lid for stackable beer storage box for AA batteries

In case you accidentally knock over the storage box and the batteries would spill out. That way batteries stay firmly in the box and you don't have to collect them :) Stacking also works and the inserted lid is not intrusive at all. Tried with the classic and also the simplified bottom of the boxes. It is printed with the same settings (and together) with the boxes. Without support, upside down. Now just only for AA batteries. TODO: AAA batteries Thinner light version Heavy duty lid for traveling (add side grips) Holding upper box (box connector) Full lid for dust protection