If you were around in 1985, you probably remember the New Coke fiasco. Coca-Cola thought the soft-drinking public would enjoy it if they changed the classic formula they’d been using since 1886. But people were outraged! The backlash was so intense, the original formula was reintroduced within a few months. And Pepsi wasted no time in capitalizing on Coke’s misstep.

Pepsi commercial, “They changed my Coke” (1985)