That is a pretty big glass if those are real marachinos. The picture is as crystal clear as the ice. All I could ask for is perhaps moving the camera a little to the right to get full shadow of glass and to cut out the uninteresting area behind the bottle on the right.
Hmm. A different, but effective take on "proportion" - very nice idea. My biggest problem is with your lighting - try it again - emphasize the red and reduce the bright spots.
Hey in Newfoundland we call them Partridgeberries. We use them mostly in jam. They are in the cranberry family I think. Never knew they could be used a garnish for vodka. Actually, here they produce a liquore made from them.