Abstract: A refreezable container for a cold storage structure which can be releasably secured to the lid of the structure is the subject of the present invention. The container comprises yieldable spaced apart sidewalls which form an enclosure for holding a refreezable liquid. A passageway through the enclosure and its sidewalls receives an elongated stud. The stud has a gripping surface at one end and is threaded on the other end. Along the length of the stud a lateral projection extends outwardly so that the combined dimension of the projection and the stud is greater than the corresponding dimension of the passageway. The yieldable passageway walls permit insertion of the stud which may then be turned to screw the threaded stud into a correspondingly threaded receptacle in the lid of the cold storage structure.