Component for case, intended to be a part of a case of a content of a product forming a solid mass, such as a cosmetic product suitable for removal by means of a pick-up utensil or manually, such component having an axis, and comprising: a. a bottom with a hollow, which includes a lateral peripheral bottom wall having a lower edge, an upper transversal bottom opening, and a lower transversal bottom opening limited by a bottom opening edge and comprises a means for fixing an insert; b. a cover which includes a transversal cover wall and a lateral peripheral cover wall; c. a side opening / closing film hinge, associated between the bottom and the cover; d. a means to maintain in the closed configuration, which is reversible and associated with the bottom and with the cover; e. the bottom, the cover and the hinge are one single monobloc plastic component bottom + cover + hinge molded in an intermediate manufacturing conformation in which it is fully opened flat at 180°; f. the material of the component is selected as being a plastic material which can be injection molded, and such that, with the thickness of the peripheral bottom wall or transversal cover wall and peripheral cover wall, it forms something sufficiently rigid as a whole, in particular the thicknesses of the peripheral bottom wall and the transversal cover wall and peripheral cover wall are equal or almost equal; g. the material of the bottom + cover + hinge component is selected such that, with the thickness of the hinge, it forms something sufficiently deformable as a whole, the thickness of the peripheral bottom wall, the transversal cover wall and the peripheral cover wall being higher than the thickness of the hinge; h. the film hinge is chosen to provide a pivot axis space which extends in a lateral transverse direction, ensuring that an easily pivoting movement occurs over an extent in the pivot axis space; i. the film hinge is connected to the peripheral bottom wall within an upper second recess and to the peripheral cover wall within a lower third recess, so that the hinge registers substantially in the envelope formed by the external faces of the peripheral bottom wall and the peripheral cover wall. a. a bottom with a hollow, which includes a lateral peripheral bottom wall having a lower edge, an upper transversal bottom opening, and a lower transversal bottom opening limited by a bottom opening edge and comprises a means for fixing an insert; b. a cover which includes a transversal cover wall and a lateral peripheral cover wall; c. a side opening / closing film hinge, associated between the bottom and the cover; d. a means to maintain in the closed configuration, which is reversible and associated with the bottom and with the cover; e. the bottom, the cover and the hinge are one single monobloc plastic component bottom + cover + hinge molded in an intermediate manufacturing conformation in which it is fully opened flat at 180°; f. the material of the component is selected as being a plastic material which can be injection molded, and such that, with the thickness of the peripheral bottom wall or transversal cover wall and peripheral cover wall, it forms something sufficiently rigid as a whole, in particular the thicknesses of the peripheral bottom wall and the transversal cover wall and peripheral cover wall are equal or almost equal; g. the material of the bottom + cover + hinge component is selected such that, with the thickness of the hinge, it forms something sufficiently deformable as a whole, the thickness of the peripheral bottom wall, the transversal cover wall and the peripheral cover wall being higher than the thickness of the hinge; h. the film hinge is chosen to provide a pivot axis space which extends in a lateral transverse direction, ensuring that an easily pivoting movement occurs over an extent in the pivot axis space; i. the film hinge is connected to the peripheral bottom wall within an upper second recess and to the peripheral cover wall within a lower third recess, so that the hinge registers substantially in the envelope formed by the external faces of the peripheral bottom wall and the peripheral cover wall.