A package unitarily formed from a cardboard blank for storing a product, the package comprising: a back wall, a first hinged lid section and a second hinged lid section to set the package in an open or a closed position, the first and the second hinged lid sections (30, 32) being opposite the back wall when the package is in the closed position, a first pair of side walls (22, 24), the side walls (22, 24) of the first pair being arranged opposite each other and extending from the back wall, the first hinged lid section extending from one of the side walls of the first pair and the second hinged lid section extending from the other side wall of the first pair, and a second pair of side walls (26, 28), the side walls (26, 28) of the second pair being arranged opposite each other and extending from the back wall, each of the side walls (26, 28) of the second pair comprising an extension that forms a stiffening member (36, 38), wherein the stiffening member (36, 38) is U-shaped comprising a base, a first leg and a second leg, the first and the second leg (42, 44) being arranged opposite each other and extending substantially perpendicular from the base, and the first leg is attached to the back wall, and the second leg supports the first hinged lid section and the second hinged lid section when the package is set in the closed position, characterized in that the back wall comprises at least one crease acting as a hinge and extending between the U-shaped stiffening members (36, 38), and at each end (68, 70) of the crease an intersection (72, 74) is provided which extends from the crease to one of the hinged lid sections (30, 32), so that a portion is turned in a substantially perpendicular position with respect to the back wall, and a portion which extends between the intersections (72, 74) is set substantially in alignment with the second legs of the U-shaped stiffening members (36, 38) to provide an indentation when the package is set in the closed position. a back wall, a first hinged lid section and a second hinged lid section to set the package in an open or a closed position, the first and the second hinged lid sections (30, 32) being opposite the back wall when the package is in the closed position, a first pair of side walls (22, 24), the side walls (22, 24) of the first pair being arranged opposite each other and extending from the back wall, the first hinged lid section extending from one of the side walls of the first pair and the second hinged lid section extending from the other side wall of the first pair, and a second pair of side walls (26, 28), the side walls (26, 28) of the second pair being arranged opposite each other and extending from the back wall, each of the side walls (26, 28) of the second pair comprising an extension that forms a stiffening member (36, 38), wherein the stiffening member (36, 38) is U-shaped comprising a base, a first leg and a second leg, the first and the second leg (42, 44) being arranged opposite each other and extending substantially perpendicular from the base, and the first leg is attached to the back wall, and the second leg supports the first hinged lid section and the second hinged lid section when the package is set in the closed position, characterized in that the back wall comprises at least one crease acting as a hinge and extending between the U-shaped stiffening members (36, 38), and at each end (68, 70) of the crease an intersection (72, 74) is provided which extends from the crease to one of the hinged lid sections (30, 32), so that a portion is turned in a substantially perpendicular position with respect to the back wall, and a portion which extends between the intersections (72, 74) is set substantially in alignment with the second legs of the U-shaped stiffening members (36, 38) to provide an indentation when the package is set in the closed position.