Coca-Cola North America is piloting its signature contour shape in two-liter bottle sizes in two U.S. markets this summer: Birmingham, Ala., and Chattanooga, Tenn. The company says the advantages for consumers go beyond “classic good looks,” indicating that contour-shaped two-liter bottles are easier to hold and pour. The advantages for retailers? The company says it has conducted research that suggests the two-liter contour package has the “potential to re-energize sparkling beverage sales”. All Coca-Cola trademark brands will be part of the pilot.