packaging suitable for food products has at least one wall which is formed in a semi - rigid material such as cardboard and has at least one edge defining an opening for inserting articles , in particular foods , and at least one first flap articulated to that edge along a folding line . the packaging can be conformed into a service configuration in which the flap uncovers the opening and a first storage configuration in which the flap closes the opening . the wall includes reversible deformation arrangements for conforming the packaging into a second storage configuration in which the first flap clamps the wall in a substantially sealed manner along the folding line and in the area of the edge .