This was fun. I took a Saratoga Water Bottle that a faculty member had left in the teacher's room and I began photographing it with natural light. Suddenly I remembered the interesting light that I found with my cd/rainbow shots by using my classroom's overhead projector. I placed the bottle on the glass surface and turned on the bright light. WOW..it was cool! The light from underneath illuminated the bottle, enhancing its blue color.
The shot above was the view that I saw by nearly sitting on the floor and shooting up at the neck of the bottle. That bottle cap simply came alive! The light from below, reflected off a piece of glass place just out of view of the bottle cap. I really thought this shot was wild. Below, I shot from above and lessened the amount of light on the bottle to get a 'dimmer', moodier shot.
Below, I placed the bottle, sideways, on the glass plate of the overheard projector. Instantly the white light mixed with the blue bottle to cast all sorts of different shades of other colors, including the gold that you see. I had fun with this, I hope it shows!