What has more caffeine an energy drink like Red Bull 30mg 100ml or a cup of coffee?

The coffee has more caffeine, and a lot less expensive too.

Red Bull 30mg has 30 milligrams of caffeine per 100ML and a fresh brewed 100ml drink of coffee would have between 55 and 85 mg of caffeine. A proper mug of coffee would contains up to 210 mg caffeine as it is 250 ml.

Red bull contains: carbonated water, sucrose, glucose, acid (sodium citrates), taurine (0.4pc), glucuronolactone, caffeine (0.03pc), inositol, vitamins (niacinamide), pantothenic acid (B6, B12), flavors, colors (caramel, riboflavin). Each 250 ml can contains 80 milligrams of caffeine.