Fallout: New Vegas Auto-inject stimpack

I thought I'd have a go at this one next.

I left the dial area blank. it comes out to 27.49mm diameter by 2mm deep.

I was thinking of putting a paper label then a clear plexi circle over the top of it for effect. As for the medicine window, I would paint the background red to a point then install another piece of plexi to give it the effect of a glass tube.