I took a couple of approaches to this one, the first photo is from our nieces 5th birthday party where one of the fun activities for the kids was to fill glass bottles with different colors of sand to make these neat little decorative pieces. I grabbed this one as it was so close in color scheme to the tablecloth beneath it, it worked out nicely that way!
I also like that glass is made of sand and that this container contains the same stuff that it’s made from, so this is a more literal approach.
These next shots utilise glass as an effect upon other subjects.
A reflection of a party in action.
In this shot glass is the subject as well as an effect as it casts the clouds in the sky behind in different colors.
The sky photographed with my iphone through my sunglasses.