a delivery worker carefully lifts a brown corrugated cardboard container from a tall stack. The lightweight box bends slightly in his hands showing its flexible cardboard construction. As he moves it toward the store entrance, other workers unload similar containers from the delivery truck. The containers are various sizes but all made from the same brown corrugated material with folded edges and flaps. Store employees wait nearby to receive the shipments and sort them by department. light boxes and containers made of cardboard being handled and transported