Parts cup for a Prusa i3

I saw the original design (all credit to "Bradley") but realised that it didn't quite do what I wanted - I needed something a bit larger, and also wanted it to fit over the 6mm plate of my Prusa i3. In addition, I took on board one of the comments from the original design and made the cup hemispherical, to make it easier to pick out items.

The OpenSCAD file is incredibly basic, and easy to modify if you want a parts cup of a different size. Just bear in mind that if you change one parameter