Beer

Lot of it. With bubbles :)
PS.: The "bubbles" deserve a short comment perhaps. Most probably they are orbs (or pseudoorbs, if you think that real ones exist:). Orbs, however, appear usually when using the flash against a distant dark background and some dust (or raindrops or snowflakes or tiny insects) floats in air nearby. Here the flash was not used. The picture, however, was taken just under a street light and there was a weak rain. Probably this was enough to create the orbs.