Energy drink junkies are not happy about this soft drink line getting canceled by PepsiCo. PepsiCo recently made the shocking announcement that they are discontinuing the entire Mtn Dew Energy line. Less than a year ago PepsiCo dropped Sierra Mist only to replace it with a very similar drink called Starry. Starry is being marketed to a younger age group but it is basically the same thing. So, why are they dropping what seems to be an uber-popular energy drink?