a device for storing or packing loose objects comprising a plurality of container elements , each having a bottom wall , upstanding side and end walls , and an open upper side , which elements are connected to one another by hinge joints arranged between the side edges of the bottom walls thereof to form a continuous row of elements having a first end and a second end and which elements are so shaped and dimensioned that this row of elements , from its extended position and starting from said first end and said second end , can be spirally rolled up into tow adjacently positioned blocks of prismatic form in which the open upper element sides are closed off by wall portions of other elements lying inwardly thereof in said blocks and engaging said open sides . said blocks are interconnected through an intermediate portion of said row of elements .