Packaging device forming a container

A packaging device forming a container comprising a formable rigid structural element (6), joined to a sheet of flexible material (3) provided at the periphery with means for retaining a clamping tie (4), characterized in that said rigid structural element (6) has two parts (5, 7), a first part (5) that comprises a multiplicity of radial branches (50), and which is made from a material allowing said branches (50) to be cinched, and a second part (7) made of rigid material, which centrally has a flat portion (70) and at its periphery radial arms (71) of which there are fewer than or the same number as said branches (50), said radial arms (71), which are shorter than said branches (50), are designed to define the shape and volume of the container and to that end they each have an end part which diverges from the plane of said central planar part (70) by flaring, said first and second parts (5, 7) being provided with means (53, 73) for securing to one another such that they are coaxial with one another, and such that said branches (50) are in line with said arms (71);

• and in that at one of the faces the flexible sheet (3) is secured to said first part (5) by its face opposite that intended to accommodate the second part (7).