I have here in front of me a jug of Diet Cola from the Dollar store and when I'm throwing caution to the winds a jug of Diet Coke which costs a $.25 more then the store brand. The store brand contains- Carbonated water, Carmel color, Aspartame, Potassium, Benzoate (preservative) Phosphoric acid, Natural flavor, Citric acid and Caffeine. Diet Coke lists the same ingredients in a different order. 