Naturally flavored and other natural flavors. Estd 1971. 0 calories per can. www.Drinkbluesky.com. Contact us at 877-265-3621. Real matters since 1971. Our beverages have always been flavored by nature, made with zero sugar and always caffeine free - because for us less is always more. Rooted in real. Caffeine free. Gluten free. Sodium free.