A cardboard container for articles, such as vials/syringes, containing pharmaceutical/cosmetic products, obtained starting from a blank and such as to assume a opened-out configuration starting from a flattened configuration, and which, when is in the opened-out configuration, comprises: a bottom; a first wall folded and arranged at an angle with respect to the bottom; a second wall opposite the first wall, and folded and arranged at an angle with respect to the bottom; an upper face, opposite the bottom, between the first wall and the second wall, folded and arranged at an angle with respect to the first wall and the second wall, the upper face comprising at least an opening defining a housing for inserting and positioning an article, at least a slot on the first wall or on the second wall; at least a wing jointed foldably to the bottom, between the first wall and the second wall, so as to be able to be arranged at an angle with respect to the bottom and to be inserted between the first wall and the second wall and the upper face, when the container is in the opened-out configuration, the wing comprising a tab predisposed so as to be able to insert in said slot, when the wing is folded at an angle with respect to the bottom and inserted between the first wall and the second wall, so as to stabilise the opened-out configuration of the container, characterized in that: the wing has a polygonal shape so as to comprise a base side, jointed to the bottom, at least a first side, consecutive to the base side, in which the tab is realised, and at least a second side, consecutive to the base side and opposite the first side, which is inclined with respect to the base side by an angle such as to enable inserting the wing, when folded and arranged at an angle with respect to the bottom, between the first wall and the second wall which are folded at an angle with respect to the bottom, and wherein the slot is realised in the first wall or in the second wall so as to be inclined with respect to a plane that is perpendicular to the bottom. a bottom; a first wall folded and arranged at an angle with respect to the bottom; a second wall opposite the first wall, and folded and arranged at an angle with respect to the bottom; an upper face, opposite the bottom, between the first wall and the second wall, folded and arranged at an angle with respect to the first wall and the second wall, the upper face comprising at least an opening defining a housing for inserting and positioning an article, at least a slot on the first wall or on the second wall; at least a wing jointed foldably to the bottom, between the first wall and the second wall, so as to be able to be arranged at an angle with respect to the bottom and to be inserted between the first wall and the second wall and the upper face, when the container is in the opened-out configuration, the wing comprising a tab predisposed so as to be able to insert in said slot, when the wing is folded at an angle with respect to the bottom and inserted between the first wall and the second wall, so as to stabilise the opened-out configuration of the container, characterized in that: the wing has a polygonal shape so as to comprise a base side, jointed to the bottom, at least a first side, consecutive to the base side, in which the tab is realised, and at least a second side, consecutive to the base side and opposite the first side, which is inclined with respect to the base side by an angle such as to enable inserting the wing, when folded and arranged at an angle with respect to the bottom, between the first wall and the second wall which are folded at an angle with respect to the bottom, and wherein the slot is realised in the first wall or in the second wall so as to be inclined with respect to a plane that is perpendicular to the bottom.