Abstract: A food emulsion casing end-closure, and the method of making it, are disclosed. The end-closure is formed of a twist knot through which an air escape aperture is extended. The twist knot forms part of a wadding which is stuffed into the bore of a shirred casing stick and interference fitted therewith. The wadding acts as a shock absorber for the initial shock of extruded food emulsion and serves as means to enhance the consistency of that initial portion of extruded food emulsion. The twist knot is sufficiently tight that it can serve as a permanent end-closure or it may readily be opened by untwisting. Also provided is a lock means for maintaining the twist knot as such.