"There could be several reasons behind the decision," Pettersson continues. "Of course one is the cost. Since no-one is prepared to pay too much for moving an empty box, it makes it especially important to have this done in a cost efficient way. The answer could be to move the handling of empty containers away from the expensive land close to the quay to cheaper land a bit further away and utilise this land in an optimal way, i. e. stacking the containers as high as possible. The handling should be done by less costly dedicated empty handling equipment. Efficiency can be further increased by utilising more sophisticated machines, for example double handling ECHs."