May 8, 2013 No Comments FREE 20oz Coca Cola at Hess Express (Today Only) Get a FREE 20oz Coke when you download or check-in with the free Hess Express mobile app. Valid 5/8/2013 only. Source. Locator. FREE 20 oz Coca Cola at Hess Express (Today Only) – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.