Bigger. Faster. Stronger. Party like a rockstar. Definitely not for the faint of heart. This energy drink separates itself from the rest with the combination of taste and impact. Rockstar is the world's most powerful energy drink. Enhanced with the potent herbal blend of Guarana, Ginkgo, Ginseng and Milk Thistle, Rockstar is scientifically formulated to provide an incredible energy boost for those who lead active and exhaustive lifestyles, from athletes to rock stars. 16oz.