Photographer Ernie Button's photo project is called Vanishing Spirits: the bottom of Scotch glasses once the whisky has evaporated way, leaving textures and colors.

 From the project page:

Some of the images reference the celestial, as if the image was taken of space; something that the Hubble telescope may have taken or an image taken from space looking down on Earth. The circular image references a drinking glass, typically circular, and what the consumer might see if they were to look at the bottom of the glass after the scotch has dried.