Coca-Cola is planning to launch Enviga, a soda that is said to burn 50 to 100 calories just by drinking a 12-oz. serving, next year, per one executive. Enviga, a green tea-based, caffeinated, carbonated drink, is in clinical testing and is said to speed up the user's metabolism. The beverage will target active lifestyle consumers. A Coke rep said, "Some [of our projects] may find their way to market and some may not." Studies have shown that drinking green tea may promote weight loss by stimulating the body to burn calories.