|Hello from the Critique club, my name is Jon Rowe, and i will be looking at your image this evening :)
Composition/Lighting : composition wise this shot i feel is alright. It is smack dab in the middle, but i think it works in this instance. it just seems too compacted in on the sides. possibly more room on the sides? lighting, seems fine. i do not really see a real problem with it. there really is not a lot of detail in the milk, which is the real focus point of this entry.
Challenge : overall it definitely meets the challenge, but with the direct lighting, i'm guessing is what you used, there are no real curves or detail in the milk, it's just somewhat there. i think that's what made this a sub-6 image. you did a great job on it though, so please don't be discouraged. i feel it has great contrasts and full tonal range. keep up the great work!
Conclusion : great job, i think you did well, and received some good feedback from other users. Keep participating and growing, you're doing very well.
Keep on shootin!
Good luck on your future challenges:)