Starbucks says its Refresher drinks are gaining in popularity throughout the day.Paige DiFioreCold beverages, especially Refreshers, are driving sales at Starbucks.Cold drinks accounted for 75% of beverage sales in the company's third quarter.Starbucks Refreshers saw double-digit growth this past quarter.Some of the hottest cold beverages selling at Starbucks lately are missing one thing: The taste of coffee.Starbucks Refreshers, a popular line of fruity drinks infused with green coffee extract, usually sell more in the afternoon.