Yesterday we went on the hard hat tour of Sierra Nevada in Mills River and I must say that brewery is amazing. I learned something very simple which you may find useful. On the shoulder of the bottle is a date code which begins with the date of bottling followed by a letter, M or C, and finally with some additional numbers which indicate the batch. That M or C is important because it determines if the beer was made in Mills River, NC or Chico, CA. I’m not good enough to take a photo of the bottle shoulder to show the code so enjoy a photo of the new brewery instead.