Abstract: A food covering is provided constructed of thin-film material which is substantially impervious to the flow of air and/or water therethrough. The food covering includes a method of tightening the food covering, on a bowl or other receptacle, which may be constructed utilizing either a tightenable string or other tie material passed through a pocket located near the perimeter of the food covering, or slits together with adhesive material to facilitate holding the food covering snugly against a receptacle. A slide-lock may also be utilized to hold the string tight after cinching.