looks like a snapshot, out of focus, The backlit technique here makes the carton too dark while the background is given plenty of light. And the composition is poor. There's nothing for the carton to be balanced with. Maybe a shot from above playing with the idea of the carton camoflaging itself amongst what (from this angle) seems to be a tablecloth with similar colours to the carton.
Subject seems too centered. The backlighting was quite nice, but if you had used a white reflecting board in front of the cartonand slightly to the left, it would have brightened it up just enough to contrast nicely with the backlighting.
IMHO very flat light, a lot of noise and a boring subject. I'm sorry I don't usually go below 5 on a score but this gets a 4 for the reasons mentioned.
Nice colors...however, this picture could use a boost of contrast. Also, try not to center your subject in the picture. Perhaps an angle shot and adding a glass of the milk woud give it an artistic edge.
Besides being a totally boring object, the lighting is bad, the background is distracting and the milk pack isn't even attractive... sorry, just my 2 eurocents.