Bottle stopper e.g. for sparkling wine during fermentation comprises metal cap with inner seal and medium-density polyethylene plug

摘要

The stopper, for a bottle or other container with a neck (2) and a mouth (4) with an outer rim (5), consists of a metal cap (12) with an inner seal (15), and a polyethylene plug (7) with a cylindrical skirt (8) forming a force fit with the inner surface of the neck and having an outer annular groove (10). The plug also has a transverse end wall (9) with a projecting rim (11) fitting over the mouth (4). The metal cap is of stainless steel at least 0.25 mm thick.