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I'm not 100% sure about this, but I believe Coca-Cola successfully protected "Cola" from being genericized by asserting that the generic term was "cola drink". Pepsi is now just known as Pepsi, and the company's name is now PepsiCo instead of Pepsi-Cola.

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I think you're mistaken.

Pepsi-Cola Company changed their name to PepsiCo to reflect their more diverse product line after their merger with Frito-Lay, not as a result of any trademark lawsuit. In the United States at least (though I believe this is the case elsewhere as well), "cola" is the generic term, though Pepsi doesn't use it in their packaging much anymore. See for instance RC Cola.

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