Diet A&W® Root Beer. Made with aged vanilla. Naturally and artificially flavored. 0 calories per bottle. 6-pack. Caffeine free. Bottled by an affiliate of the American Bottling Company, 5301 Legacy Drive, Plano, TX 75024. Consumer comments 1-866-AW ROOT BEER. rootbeer.com. ©2011 A&W Concentrate Company.