Every long-term portfolio should feature a collection of blue-chip stocks, Wall Street's best companies. These stocks probably won't make you wealthy overnight, but they have a probability of success if you let them marinate for long enough, letting earnings grow and compound your returns.

These companies may not be the flashiest, but they are proven businesses that thrive both in good and bad times. The best news for investors is that you can start with a small sum. Here are two stocks, each priced under $100, that you can invest in for the long term -- essentially "forever" stocks for all intents and purposes.

The Coca-Cola Company (NYSE: KO) has been a staple of Warren Buffett's portfolio for decades. His company Berkshire Hathaway owns a stake worth approximately $24 billion, its third-largest holding. Coca-Cola is a global beverage leader, selling various brands of sodas, juices, water, teas, coffee, and more.

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Source Fool.com