I had a recent question about the green bottle which was posted earlier. There was some discussion about the highlights, dark areas, was it right, were the normals right, etc:
Because things are changing with the materials, most posts can be considered early development. So in response here is a quick set of renders of the same bottle, but with different materials and settings. The angle and light remains constant.
The glass renderer (blend mode) is used as this gives a glass-like look. Multiple bottles are shown:
vjointeractive 