Amberbock Added To A-B’s Draftmark System Michelob Amberbock will be added to the Draftmark line soon. The Draftmark System will hold a full gallon of, and keep the beer fresh and pressured for 30 days. There is a “jar” that is inserted into system that lives in your fridge. After the beer is in, you pour. by Reid Ramsay May 3, 2012