After water, the most consumed beverage in the world as of 2015 is tea. About six billion cups of tea per day are consumed worldwide, according to The United Nations Food and Agriculture Organization.
Tea is the national drink of China and India, where more than two billion people live. There are about 1,500 different varieties of this versatile beverage. The four main tea types are black, green, oolong and white. Tea contains no sodium, fat, carbonation or sugar and is calorie-free if nothing is added to it. Tea contains antioxidants and is known to have many health benefits, including reducing the incidence of diabetes.