We were once a nation of Coke vs. Pepsi. The stakes of the game have changed.
Add Yahoo as a preferred source to see more of our stories on Google. Shelves in a grocery store stacked with bottles of Coke Zero and Diet Coke. - MDV Edwards/Shutterstock Coca-Cola has been a ...
Diet Coke and Coke Zero are two of the world's best-selling soft drinks, but what exactly is the difference between them?
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