Each can of Rockstar Original has 160 milligrams of caffeine per 16 ounces, and another flavor in its product line, Rockstar Punched Fruit Punch, has 240 milligrams per can. In one fell swoop ...

There is a three-way tie for the top of the caffeine list – Celcius Heat, Bang and Rockstar Xdurance, all with 300 mg of caffeine per can. Although this comes in under the 400 mg threshold ...