In 1985, which major beverage company launched a reformulated flagship product that caused such massive consumer backlash it had to reverse course just 79 days later?

In the competitive world of pop culture marketing, not every campaign hits the mark. In fact, some spectacularly miss! The 1980s Cola Wars between major soda brands produced some of the most iconic advertising moments in retail history—but also one of the most notorious marketing blunders ever. Test your knowledge about this legendary product fail that cost millions and became a case study in what NOT to do in marketing.

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• Coca-Cola with 'New Coke'
• Pepsi with 'Crystal Pepsi 1.0'
• Dr Pepper with 'Dr Pepper Classic'
• 7UP with '7UP Gold'

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