I'm reviewing this challenge a second time after considering what the s-curve technique is really supposed to be. That is a compositional technique used to lead the viewer into the image. Though there is an obvious s-curve in the arrangement of the glasses, I'm personally not finding it to be an element that leads my eye into or through the scene. I'm giving this one the benefit of the doubt, however and letting my earlier vote stand.
Yes, I see the S but I had to search for it and it doesn't lead me through the photograph. However, the composition and lighting are excellent so this gets a 7 from me.
Very clever pov. Definitely a new take on the glasses image. Technically, this is a spectacular image, with fabulous clarity and detail on the glasses. For the challenge, however, the"s" is not very clear, and is rather squared off instead of flowing. I don't know if that makes any sense.