Several famous products failed commercially despite heavy advertising spending including New Coke, the Ford Edsel, and RJ Reynolds' smokeless cigarettes called Premier. Market research and testing did not predict negative customer reactions to significant changes in iconic brands or health concerns over unproven product concepts. Costly advertising campaigns were unable to overcome fundamental product flaws that consumers discovered for themselves.

9. http://www.growthink.com/content/10-famous-product-failures-and-advertisements-did-not-sell-them