When you think of billionaire investor Warren Buffett, you probably think of long-term successes. He's led Berkshire Hathaway to a compounded annual gain of 20% over more than half a decade. That's compared to a 10% gain for the S&P 500 index. Buffett's done this by picking companies with solid businesses -- trading at reasonable valuations.

One of Buffett's favorites is Coca-Cola (NYSE: KO). He initially bought shares back in the late 1980s and has held on ever since. In fact, Coca-Cola today is Berkshire Hathaway's third-largest position.

So, should you follow in Buffett's footsteps and add this beverage giant to your portfolio? 

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Source Fool.com