Disposable packaging, comprising a container (1) that defines a main compartment (2) and at least an additional compartment (3). The container (1) is bowl-shaped and is closed on the upper side by a film, or by a cover, in order to prevent the main food component contained inside the main compartment (2)--from coming out. Moreover, the additional compartment (3) is closed by a slidable sealing system of the cylinder-piston type. In the closure position of the piston, which is formed by a plug (14), the food component contained in the additional compartment (3) cannot mix with the food component located in the main compartment (2), whereas in the opening position of the plug (14), the dressing/seasoning may leak from the additional compartment (3) through lateral apertures of the plug (14), at the time the user turns over and shakes the packaging.