Well just added some textures and shaders to the bottle and the Pils glass for the custom made Dittschberger beer ad.
Well here is just a render with the shaders. The glass, bottle and beer are just simple dielectric shaders with just some textures attached to it via layered shader.
The foam is just a fast simple SSS shader with a little bump. Im rather happy with the result. Foam isnt very easy. Once animated I probably need a different method for the closeups.