From working moms to doctors on the night shift, Americans' supply of good old-fashioned energy seems to be wearing thin, and many turn to energy drinks. Since the early 2000s, energy drinks have rocketed in popularity. By 2027, sales of energy drinks and shots – such as Red Bull, Monster, Rockstar and 5-Hour Energy – are expected to reach $86.1 billion, according to investing website Investopedia.