Red Bull is the original energy drink. Endlessly copied by competitors, the slender eight-ounce, blue-and-silver can is recognized all over the world. Affectionately referred to as “speed in a can,” it contains taurine (an essential amino acid), glucuronolactone (a carbohydrate) and caffeine. Red Bull claims to “give you wings” by improving concentration and alertness. Its taste is notoriously hard to describe (Pixy Stix? Carbonated Sweet Tarts?) but unquestionably distinctive. In 2012, Red Bull's dollar market share in the U.S. was 43 percent, however it has been banned in some countries due to health concerns. Despite this controversy, Red Bull continues to reign supreme, from bars to college campuses, truck drivers to tired office workers. The brand is also known for its over-the-top marketing stunts. In 2012 Red Bull helped finance Austrian skydiver Felix Baumgartner’s record-breaking supersonic freefall jump from 39 kilometers above the earth. Other types of Red Bull include Red Bull Sugarfree, Red Bull Energy Shots and Red Bull Cola.