 Duncan is dropping a new kind of energy. Introducing Sparked Energy by Duncan. Available in two full-on delicious flavors, Berry Burst and Peach Sunshine. A revitalized burst of caffeine, vitamins, and minerals gives you the energy to turn the fun up to 11. Drop by or order ahead on the Duncan app today. Fruit flavored, contains 0% fruit juice, caffeine from caffeine and guarana. Participation may vary. Limited time offer, term supply.