The original version is very thin, as thin as paper, and it cracks easily with a little force. I redrew it and changed the wall thickness, and it turned out really nice~ I've made more than a dozen of them to hold wiring terminal heads, numbered tubes, small parts, etc. They're very useful. You can stack them and they don't take up much space. A tray of 1 kg of material can make about 5 of them.