I like the idea on this shot, but for me the problem is the focal point.
With such a tight focus, I would like to see the focus on the base of the glass, or perhaps the opening. Really the base though, as that's where the brightest lighting is. (my two cents)
The angle of this feels like the glass is going to fall right off the page. Which is good and bad. Not so great for a technically sound image but kind of cool to give a surreal feeling. Not really an engaging subject and the use of light wasn't played up as much as it could have been. At first I thought the image was out of focus but noticed the focus was actually good in the middle of the glass, probably would have prefered more of it in focus, though a shallow dof is good as I like how out of focus the back of the glass is.