Crystal Pepsi
1992-1993
In the 1990s, marketers were obsessed with the idea of purity. Clear drinks signaled purity and health, so a clear soda seemed to be an excellent bet. With a massive advertising campaign, Crystal Pepsi became an instant albeit short-lived success. The company learned from the mistake and leadership later said, “It would have been nice if we made sure the product tasted good.”
Additional info:
Mashed - Why Crystal Pepsi was a flop
Thrillist - How Crystal Pepsi Became the Soda World’s Greatest Fail