Photigy - Beer Photography Workshop - How to Shoot a Glass of Beer
https://www.photigy.com/school/how-to-photograph-a-glass-of-beer-workshop/

Beer photography is a great topic for any studio photographer, and this time we’ll be learning how to work with a glass of a beer. In this assignment we’ll find out how to style a shot, how to make a good looking (and bright) foam (this is one of most common mistakes I see on beer shots – a foam is too dark), and will learn the lighting.