Packaging of food products and associated packaging device

A packaging of a food product, comprising:

• at least one cardboard or cellulose-based container defining a volume for receiving a food product and at least one film for insulating the food product when the food product is positioned in the at least one container, said at least one container adapted to change by folding from a first configuration being a planar sheet, which is provided with pre-cuts or cutouts and in which the planar sheet does not define the volume for receiving the food product, to a second configuration, in which the planar sheet is a folded sheet having a shape including a bottom, a plurality of side walls, a flange extending along each side wall of the plurality of side walls, and an opening defined by the flange of each said side wall of the plurality of side walls, the shape defining the volume for receiving the food product, wherein the shape of the folded sheet is maintained in the second configuration by attachment of said at least one film over the opening and to each said flange,
• the packaging further comprising a reusable mold which has dimensions and a mold shape corresponding to those of the shape of the at least one container when the at least one container is in the second configuration, and the at least one container changes from the first configuration to the second configuration via at least placement of the food product on the planar sheet when the planar sheet is in contact with the mold and before attachment of the at least one film.