I designed these boxes to keep small things, like pills, organized. Why not speices when camping.The boxes are 44 mm wide and 25 mm high. You can stack as many boxes as you like, it is not necessary to use the bottom box, but it looks more complete with that box. The threads are generated using Mike Thompsons nut and bolt factory in Openscad, many thanks for that piece of code. Have fun and print your own stack. The stl files are switched to files with higher resolution in the cylinder walls and 1.5 mm side walls giving no fill in the walls.A good idea is to grease the threads with some vaseline and give them a good workout.