A container for dropping from an aerial vehicle, comprising: a bottom section, comprising a plurality of edges; a plurality of side walls, wherein each side wall comprises an upper edge, a lower edge, and two opposing side edges, wherein each side wall extends upwardly from a corresponding edge of the bottom section and is connected at its lower edge to a corresponding edge of the bottom section, and wherein the plurality of side walls circumferentially enclose a packing volume, wherein each side wall is connected to at least one adjacent side wall at corresponding side edges of the adjacent side walls to form a series of interconnected side walls; a wing structure comprising a plurality of wings, wherein each wing is integrally connected to a corresponding side wall at the upper edge of the side wall, and wherein each wing is pivotable around a pivot axis defined by the upper edge of the corresponding side wall between a passive position, in which the wing extends along the corresponding side wall, and a deployed position, in which the wing extends substantially transversely relative to the corresponding side wall; a plurality of reinforcing units, one for each wing, to increase the bending stiffness of the wing for preventing bulging of the wings; and a plurality of retaining units, one for each wing, to limit pivoting of the corresponding wing beyond the deployed position, wherein, when dropping the container with the wings in passive position from an aerial vehicle, the wings will take the deployed position automatically by air flowing under the wings, and wherein each wing is a flat panel and, in the deployed position of the wing, a cross-section of the wing at right angles to a central longitudinal line of the wing extends horizontally when the container is in the upright orientation, whereby the wing structure, in the deployed position of the wings, is configured to not rotate the container during flight, and to keep the container in an upright orientation. a bottom section, comprising a plurality of edges; a plurality of side walls, wherein each side wall comprises an upper edge, a lower edge, and two opposing side edges, wherein each side wall extends upwardly from a corresponding edge of the bottom section and is connected at its lower edge to a corresponding edge of the bottom section, and wherein the plurality of side walls circumferentially enclose a packing volume, wherein each side wall is connected to at least one adjacent side wall at corresponding side edges of the adjacent side walls to form a series of interconnected side walls; a wing structure comprising a plurality of wings, wherein each wing is integrally connected to a corresponding side wall at the upper edge of the side wall, and wherein each wing is pivotable around a pivot axis defined by the upper edge of the corresponding side wall between a passive position, in which the wing extends along the corresponding side wall, and a deployed position, in which the wing extends substantially transversely relative to the corresponding side wall; a plurality of reinforcing units, one for each wing, to increase the bending stiffness of the wing for preventing bulging of the wings; and a plurality of retaining units, one for each wing, to limit pivoting of the corresponding wing beyond the deployed position, wherein, when dropping the container with the wings in passive position from an aerial vehicle, the wings will take the deployed position automatically by air flowing under the wings, and wherein each wing is a flat panel and, in the deployed position of the wing, a cross-section of the wing at right angles to a central longitudinal line of the wing extends horizontally when the container is in the upright orientation, whereby the wing structure, in the deployed position of the wings, is configured to not rotate the container during flight, and to keep the container in an upright orientation.