Warren Buffett, the world's fourth-richest person with $90-billion wealth, drinks five cans of Coca-Cola a day and eats McDonald's chicken nuggets at least thrice a week. The 88-year-old's investment company Berkshire Hathaway owns nearly 10% of Coca-Cola, a stake worth $19.5 billion. Buffett is hosting tens of thousands of people in Omaha from May 3-5 for Berkshire's annual shareholder weekend.