Nice idea, but the picture seems kind of dark and lifeless. The colors should be very interesting, but it looks like it was taken inside and not color corrected (sorry if I'm wrong...) Did you try correcting for indoor lighting and playing with the levels to brighten things up?
This shot just doesn't speak to me in any meaningful way. Did you consider taking a shot from the side and using a shallow DOF to selectively focus on the jar with the silver cap?