hinge it is important that the fold of this hinge be sufficiently durable so that it will not break in the course of commercial packaging handling and storage in commerce concurrently however it is preferable that the hinge be as thin and neat as possible so as to provide an attractive package while providing a sufficient space between the opposed sets of flanges to safely receive and accommodate the folded flexible film 40 as upper and lower films 40a and 40b in a preferred arrangement two areas 50 towards the outer ends of these flanges are retained while a length 51 between them is provided with a very narrow slit in the formation of the rigid material which forms the upper and lower parts the areas 50 are preferably thinned so as to facilitate folding of the package in those areas fig1 and 11 illustrate another embodiment of a hinge in this embodiment the retained areas 150 are not thinned instead of a very narrow cut 51 the space between the retained hinged areas 150 is provided with a relatively large slotted cutout 151 the hinge construction of fig1 through 9 as best illustrated in fig4 is preferred over the hinge embodiment of fig1 and 11 because the former can be folded more easily into a flat condition thus providing a more attractive package the rigid upper and lower parts are preferably made of acrylonitrile copolymers polyesters polypropylene polyvinylchloride or polyester copolymers the rigid parts are preferably transparent as is depicted in the figures so that the food products therein will be visible the material which forms the upper and lower parts will preferably have a thickness of about 20.