awhile back coke changed the recipe for coca cola and renamed it "new coke" it tasted like shit and failed horribly and they then came out with "classic coke" that used the same exact recipe as old school coke.
Yeah, it was one of those all-time epic fails. Coke spent millions upon millions on advertising, testing and market research. They released New Coke to great fanfare and... surprise, it failed absolutely fucking horribly.