This started life by messing around and trying to better understand some of the built in noise textures.
The basic pattern is achieved by nesting 2 voronoi textures; adjusting the scale changes the density of the circle pattern. I then used the alpha channel to so that only part of the pattern remained visible, as it would if printed to the glass.
Once I had the pattern I wondered how it could be used and thought of some retro drinking glasses. All in a very quick project; I’m trying to do more of these as exercises after getting lost (and somewhat frustrated) in some much bigger pieces.
Colour variation