| abstract |
One embodiment of the present invention provides a novel packaging article, which includes a cover and a base having non-edge localized connecting structures, such as, a protrusion and a receptacle cavity. The cover and the base may have different thermal expansion coefficients such that, when subject to heating (e.g., microwave heating) or cooling (e.g., refrigerate storage), the cover and the base do not expand or shrink to the same degree. Furthermore, the cover and/or the base may comprise a biodegradable or edible material, such as, without limitation, starch. |