This is a very colorful, pretty shot. I would have liked to had seen the focus more on the bottom right of the cup (more towards the center of the picture), especially since that's where the starburst of light is. My eyes are being drawn to the focal point, but then to the star, and then back again. It's hard to focus on one spot. I like the shadow cast, makes for a nice addition.
Guessing it's a glass of carbonated water/clear soda of some sort?