A shipping box comprises a bottom structural flap and a plurality of sidewall structural flaps, of which at least two are connected to the bottom structural flap, and assembly elements that assemble the box in a stable way. The box is foldable in a flat folded position in which, from its upper part, in the use position, to at least three of the structural sidewall flaps are connected at least three functional flaps independent of each other, making the functional flaps the functions of lid, interior space reducer, fastening and/or handle, and that the assembly elements are located on the internal part of the box.