For the above bottle, I would imagine something fruity. It is in a pear shape, and that's what leads me to a tropical/fruity taste.
I would imagine a root beer out of this bottle. It has the style of a classic bottle, and either coke or root beer come to mind.
For some reason, I think of cheap wine when I see this bottle. It might be the little groove at the bottom of the bottle that makes me think so.