Mello Yello is a high-caffeinated, citrus-flavored soft drink produced and distributed by The Coca-Cola Company which was introduced on March 1, 1979 to compete with PepsiCo's Mountain Dew.Mello Yello was withdrawn from Australia in the early 1990s, being replaced with the similar but uncaffeinated Lift.There have been three flavored variants of Mello Yello in North America. Mello Yello Cherry was released in response to Mountain Dew Code Red.