COLD STORAGE AGENT VESSEL

PROBLEM TO BE SOLVED: To form end rims of arcuate corners and restrain the generation of cracks on a cold storage agent vessel upon freezing cold storage agent, by a method wherein a vessel substrate is put on a vessel main body, by fitting ribs provided on the outside surface of the vessel substrate, into notches provided at the inside of side wall of a cold storage vessel main body near the upper end of the same. SOLUTION: Fitting units 16 for engaging with four pieces of projections 15 are provided near the corners of one surface of a vessel substrate 11. On the other hand, projections 15 opposed to the fitting units 16 are provided on the surface of a vessel main body. A cold storage agent vessel is made of a resin such as high-density polyethylene or the like and, therefore, when the projections and fitting units are provided on the front and rear surfaces of the vessel substrate and the vessel main body at opposing positions while these units are engaged, slip between each others of a plurality of cold storage agent vessels can be prevented. Further, a space of the degree of several mm is produced between two sets of up-and-down cold storage agent vessels whereby cold air prevails sufficiently across the whole outer surfaces of the cold storage vessel, and cold storage agent can be frozen efficiently.