But taste tests consist of relatively modest sips, and Americans don’t drink tiny sips of soda. We drink whole cans of soda. We drink 20-ounce bottles. We drink Big Gulps at 7-Eleven. We drink sodas so large that Michael Bloomberg wants to make them illegal. Serious soda drinkers consume multiple servings per day, every day of the week. And while we want something sweet, we don’t necessarily want that kind of long-term relationship with something too sweet.
That’s why New Coke could succeed in a lab but fail in the marketplace. The Pepsi Challenge is a great marketing gimmick but not a viable path to displacing the leading brand. Some rivalries come down to the fundamentals. Coke just has a flavor that most people like better, and decades of brand-on-brand combat can’t change that.