Abstract: Food storage vessels in the form of foam polystyrene cups are each formed with an enlarged cap seat extending from a bottom wall of the cup to define a compartment to be filled when the cups are inverted, with deliquescent or hygroscopic material which can be reconstituted with the addition of water. The cups are inverted after stacking and held together by means applying endwise pressure thereto. In this nested and stacked condition, each cup has a depending base wall, which forms the cap seat, in sealed engagement with an adjacent portion of an adjacent nested cup to provide a sealed enclosure for the material between adjacent cups. Each of the cups is a thick wall, one-piece molded plastic cup preferably of foamed polystyrene.

Abstract: A plurality of stacked cups are nested and axially constrained against separation to assure cup-to-cup sealed engagement with portions of adjacent cups to prevent sifting of product from sealed enclosures between adjacent cups. The cups are thick walled, one piece molded plastic cups formed with integral radially inwardly projecting shoulder means spaced upwardly of the bottom wall of the cup. A marginal portion of an adjacent telescoped cup abuts and rests on the shoulder means to form the sealed enclosure for the deliquescent or hygroscopic material which can be reconstituted with the addition of water.