The craft brew Blue Moon is the fastest growing beer in America. But did you know the Belgium white is actually made by Coors? Not many people do, as the mega-brewer has de-emphasized its relationship with Blue Moon in both advertising and packaging.

The new movie "Beer Wars" exposes which larger brewing companies stealthily make "craft brands," as well as other tricks of the beer industry. Check out a clip from the Michael Moore-meets-suds doc below.