Patent attributes
A stopper for use within a medicament container, preferably a plastic container, is presented having a main body defining an open distal end and a closed proximal end, where the main body has a longitudinal axis L. A cup shaped tip portion is integrally formed with the main body adjacent the closed proximal end and a distally extending flexible skirt extends from a distal end outer surface of the main body, where the distally extending flexible skirt has a rib which extends radially outward around a perimeter of the distally extending flexible skirt. A proximally extending flexible skirt extends from a proximal end outer surface of the main body, where the proximally extending flexible skirt has at least two ribs which extend radially outward around a perimeter of the proximally extending flexible skirt and that are axially spaced apart along the proximally extending flexible skirt.