Warren Buffett and Berkshire Hathaway have made a name for themselves as some of the best investors ever. As a result, the company has gained a significant following that likes to imitate its trades.

While no one should just follow anyone's moves in the stock market unquestioningly, it's useful to look at what Berkshire owns to understand what management thinks will be a winning investment. After doing that, I've spotted two companies investors can buy confidently, and one they should avoid.

Buffett is a huge fan of toll-booth-style companies. The business model is fairly simple: Create an infrastructure and take a bit of revenue from everything that passes through it. Perhaps one of the greatest toll-booth model businesses of all time is Visa's (NYSE: V) payment processing infrastructure.

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Source Fool.com