Bum energy - energy drink: cola - 12 cans don't be a bum. Wake up early and chase greatness, but don't be caught complaining. Focus & energy with cognizin® - nootropic 112mg natural caffeine 1 bum ~ 12 oz coffee low in calories zero sugar no artificial colors average amount of caffeine in a 12oz brewed iced coffee per the usda. . Bum energy drink - cola 12oz. (12 cans) zero sugar