What program are you using for modelling/rendering? Maybe your lights aren't setup to shine on the wall (You could probably add some more low-power ambient lights to the scene anyway, to soften shadows and reveal more of the scene) or perhaps your normals are messed up?
General critique:
The refraction of the glass bottles looks pretty nice, even if it's not entirely realistic. As long as your teacher isn't really picky, it should be okay.
Also, you could probably make a few different types of bottles, maybe just by scaling them differently, to add some more variation to the scene.
I have CDO. It's like OCD, but the letters are in alphabetical order, like they should be.
