ArtMetal

I'm looking at making a small sterling bottle and I want to put a screw cap on it like flask. Unfortunately, I have NO IDEA how to even begin to make the threads on the bottle, no less the cap.

Basically, I'm making an oil bottle and need to be able to screw the lid down to engage the gasket. I've run over a couple of ideas in my mind about how I might go about this, but none of them seem a good way to go.

Any suggestions would be great. I imagine it's a matter of having some kind of a mandrel with the threads cut into in and then forming the neck of the bottle to those threads, but something is telling me that I'm really missing an easy way of achieving this.

Thanks,

Marshal Threaded sterling perfume bottle: Although not the same size, etc. This is more or less what I'm trying to accomplish.