Letter v of my alphabet sub section of the photo365 project is the side of a perfume bottle photographed upside down. 10 marks if you know what perfume.
I really like photographing glass at the lens' widest aperture because i like the way the edges and textures reproduce.
I recall back to my first experience of this when shooting 5x4 film of two wine glass bottles, the result I got from the Polaroid test was wonderful - one of my favourite photo experiences.