The composition of this is a little dull. A closer crop could have been better. A lot of the glass is in shadow, which makes it hard to distinguish from the dark background. Some more lighting from the left or front could have helped.
challenge met. nice even lighting and not too many highlights. interesting composition with the can against the glass. the glass and its contents are very dark, and not that visible in front of the also very dark background. the crushed can is really the only ting that jumps out at the viewer. did you consider cropping the left? it doesn't add to the photo for me and might improve your composition (IMHO) of removing the glass from the center of the pix.