Rockstar®. Revolt Killer Citrus Energy Drink. B-vitamins. Taurine. Caffeine. Flavor with other natural flavors. Ball. 240mg caffeine per can. Contains 2% juice. In each serving: taurine 1000mg, caffeine 120mg, glucuronolactone 50mg, inositol 25mg. Total caffeine from all sources: 240mg per can. www.rockstarenergy.com. ©2015.