This time I turned off my front light. I only used back light. The result is silhouette. I think I like this result. However, this is a red wine which has solid color. For white wine which is transparent color, I believe the silhouette result will be different. I was using my Canon EOS 40D and Canon EF 24-70mm f/2.8L USM Standard Zoom Lens.
Back Light without front light will result silhouette