Method for both storing and shipping a box, characterized in that the box comprises first closing flaps of shipment that are partially or completely overlapped in their closing position, one of said first closing flaps of shipment comprising a tear strip, or said first closing flaps of shipment have dimensions such that they are at least substantially in contact with each other by their opposing ends in the closing position, and the box comprises second interlocking flaps, wherein the method comprises the steps of - first storing or preparing an order with the first closing flaps covering the whole opening of the box to protect its content and the second flaps interlocking effectively closing the exterior of the box with a closing element on second closing flaps, avoiding the use of adhesive tape, staples or glue, - then shipping the box with said first flaps closing the exterior of the box with a sealing element and second interlocking flaps providing mechanical resistance to collapsing inside the box, or vice versa, wherein the method also comprises the step of: - if storing the box is made before shipping the box, storing again said box after shipment by exchanging the position of said first and second flaps (1, 2) so that the first flaps protect again the content inside the box while the second interlocking flaps close the exterior of said box; or - if shipping the box is made before storing the box, shipping again said box by returning the first and second flaps (1, 2) to the original shipping position, the first flaps covering the whole opening of the box, and closing the first flaps with a sealing element. the box comprises first closing flaps of shipment that are partially or completely overlapped in their closing position, one of said first closing flaps of shipment comprising a tear strip, or said first closing flaps of shipment have dimensions such that they are at least substantially in contact with each other by their opposing ends in the closing position, and the box comprises second interlocking flaps, wherein the method comprises the steps of - first storing or preparing an order with the first closing flaps covering the whole opening of the box to protect its content and the second flaps interlocking effectively closing the exterior of the box with a closing element on second closing flaps, avoiding the use of adhesive tape, staples or glue, - then shipping the box with said first flaps closing the exterior of the box with a sealing element and second interlocking flaps providing mechanical resistance to collapsing inside the box, - first storing or preparing an order with the first closing flaps covering the whole opening of the box to protect its content and the second flaps interlocking effectively closing the exterior of the box with a closing element on second closing flaps, avoiding the use of adhesive tape, staples or glue, - then shipping the box with said first flaps closing the exterior of the box with a sealing element and second interlocking flaps providing mechanical resistance to collapsing inside the box, or vice versa, wherein the method also comprises the step of: - if storing the box is made before shipping the box, storing again said box after shipment by exchanging the position of said first and second flaps (1, 2) so that the first flaps protect again the content inside the box while the second interlocking flaps close the exterior of said box; or - if shipping the box is made before storing the box, shipping again said box by returning the first and second flaps (1, 2) to the original shipping position, the first flaps covering the whole opening of the box, and closing the first flaps with a sealing element. - if storing the box is made before shipping the box, storing again said box after shipment by exchanging the position of said first and second flaps (1, 2) so that the first flaps protect again the content inside the box while the second interlocking flaps close the exterior of said box; or - if shipping the box is made before storing the box, shipping again said box by returning the first and second flaps (1, 2) to the original shipping position, the first flaps covering the whole opening of the box, and closing the first flaps with a sealing element.