There are no obstacles in the PepsiCo universe, just opportunities. While the Purchase (N.Y.) giant still relies heavily on junk food and soda pop, it's making a push into more nutritional offerings and ethnic flavors such as guacamole and salsa chips. The low-carb craze is spawning a new breed of potato chip, although it also curbed demand for Tropicana juice. Offerings such as Propel Fitness Water and Sierra Mist soda kept beverage income strong and helped profits jump 19% last year. Pepsi is even bringing products from Mexico to serve the flourishing U.S. Hispanic market.