If you're looking for a Berkshire stock to buy and hold forever, look no further than Coca-Cola (KO -0.52%). Over the past 12 months, Coca-Cola's stock is down close to 7%, while the S&P 500 is up by approximately 16%. With its maturity, it's unrealistic to expect consistent double-digit annual gains from Coca-Cola's stock. When you invest in Coca-Cola, you know you're investing in a well-established industry leader that has stood the test of time. That's a recipe for longevity, which is why I personally plan to hold Coca-Cola for the long haul.