The Pure-Pak Curve carton features a curved fifth panel that makes it stand out from traditional gable-top cartons, says Elopak, the manufacturer. Users can take advantage of the extra surface to highlight product differentiators. The curve panels of the two-liter cartons are printed to match the product's color coding, such as dark blue for 2%, light blue for 1% and red for homogenized. The cartons are available in various sizes and easily incorporate a screw cap. Most filling machines can be converted to run both the Curve and standard gable-top cartons, says the company.