Tool removalable tamper indicating closure

Abstract From the Canadian patent

A tamper-indicating closure comprising disc-shaped top with an upper skirt extending downwardly from the top; an annular upper bead around the inner surface of the upper skirt; a lower skirt proximate to and in center alignment with the upper skirt, the upper skirt being disposed between the top and the lower skirt; an annular retention bead around the inner surface of the lower skirt; breakable bridge means between the skirts as the sole connection between the skirts; and a tool aperture between the skirts adapted to accept a tool means for breaking the bridge means so as to part the skirts.