290 calories per bottle. Caffeine Content: 91 mg/20 fl oz. The Tennessee. Original. Since 1940. MountainDew.com. We’re here to help. MountainDew.com or 800-433-2652. Cash in (Subject to rules (at)Pepcoin.com. Snack purchase required. Must accrue minimum balance for payment. For promo questions call 800-332-1741) at Pepcoin.com. Cash out with Venmo & PayPal. PayPal and Venmo are not sponsors of this promotion. Please recycle.