a container includes two container halves and a hinge connecting the two container halves so that the two container halves can be pivoted between a folded up position and a folded down position . in the folded up position the container includes a bottom , four side walls and an upper filling opening and is stackable on another like container in the folded up position , and in the folded down position the container is nestable with another like container in the folded down position .