http://en.wikipedia.org/wiki/Green_tea#CaffeineGreen teas have about a quarter the caffeine content, by liquid volume, of coffee.[citation needed] Green teas contain two caffeine metabolites (caffeine like substances) theophylline, which is stronger than caffeine, and theobromine, which is slightly weaker than caffeine.
Ingredients:
Water, high fructose corn syrup, citric acid, green tea, sodium hexametaphosphate, ascorbic acid (to protect flavor), honey, natural flavors, phosphoric acid, sodium benzoate (preserves freshness), potassium sorbate (preserves freshness), calcium disodium edta (to protect flavor), caramel color, yellow 5, blue1.