Very nice and cool lighting. No distracting reflections on the bottle and glass themselves - that's awesome. The bottom however, is quite jarring because of the double reflection - I'm guessing you used a glass mirror?
The execution of this photo is great. The image is clear, the contrast is great, and the colors are vibrant. The back-lighting is creating a very nice blue vignette. It's a standard ad. It would do better with a little idea, concept, and pizazz to excite the viewer. Perhaps your idea is "cool." I'm taking it to mean "cold." What if everything was on ice? That would really bring the idea of "cool" more to the forefront and excite more people to quench their thirst.
I'm too literal. I think "how did they fill up that glass and there is still a full bottle?" I'm not docking points for that of course, it's just where my brain goes. Besides, that's probably how it'd be in an actual advertisement, which is what this looks like. Love the lighthing and reflections. Nice cool color temperature too. Bonus point for not leaving the plastic seal on! :-P