I am so excited about the idea I had for this one, I started immediately.

I drew it and made notes and then was basically ready to go, when I realised that perhaps the *symetry* of a thread is very important! - good gues huh?
And then I started agonising how one would actually "make" a thread. I also want the lid to be fairly secure and want a little more then a full revolution.
And so I sat until 1 am on the internet learning about screws! It dawned on me that this has a lot to do with physics...
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