The proportions seem slightly off, though that may be my monitor for all I know. The texture is a little blurry, though by the sounds of things you are working on that. The metal doesn't quite look right. It's shiny, sure, but not the right kind of shiny for a soda can. Too white and too perfectly chrome mirror like. Soda cans in my experience tend to be greyer and more matte, depending on lighting.
Conversely, the printed part of the label probably could be more specular.The tab looks rather flat and the indents don't look quite right either, they looks too solid. It doesn't look like you could open the can.
Any way, those are my observations. I hope I do not come across as too harsh.