I designed a transparent storage program to store small items. Because its operation is very easy to see. These boxes can be stacked on top of each other. I cut transparent PET 1.5 liter water bottles, which can be found everywhere, and put them inside. This bottle is standard all over the world (I still gave 8mm tolerance). I have indicated in the photos how many cm should be cut for which model. If it is cut to these dimensions, it will fit exactly into the model.
After cutting the bottle and placing it in place, you need to glue the caps of the model at the fitting places.
The author marked this model as their own original creation.