Citrus Charge Energy Drink — 12-Pack, Zero Sugar. 12 cans (16 oz each) of citrus, each with 200 mg of caffeine and 200 mg of L-theanine, 0 g sugar and 10 calories. Made with CoQ10, L-citrulline and B vitamins. Created by retired Baltimore City firefighters, with a portion of every purchase supporting first responders through the BHB Found