Starbucks isn't just launching another drink. With its latest Refreshers debut, announced Monday, the coffee giant is expanding one of its fastest-growing businesses as it races to win customers long after the morning coffee rush ends. Beginning July 14, Starbucks customers will be able to order any Refresher drink blended, the latest move in the company's effort to expand what executives describe as a $2 billion beverage platform. Refreshers, which are iced juice and tea drinks often mixed with fruit pieces, have become one of Starbucks' biggest beverage businesses since launching in 2012, helping drive traffic later in the day as the company looks to expand beyond its traditional morning coffee roots. The strategy reflects a broader shift underway across the restaurant industry, as chains compete not only with each other but also with energy drinks, functional beverages, and social-media-fueled drink trends for younger consumers' attention and spending. Read more about Starbucks'...