A crown cap for a bottle opening, the crown cap comprising: a crown cap body comprising: a top portion having a center; a skirt surrounding the top portion, the skirt having angles, wherein the angles terminate at a lower edge defined in a first horizontal plane; an opener assembly (2, 3, 4, 5) mounted to the top portion; a first scoring line extending from the center of the top portion to the lower edge of the skirt in a continuous radial direction; and a second scoring line (6e, 6f) comprising: an upper radial segment extending in a substantially linear direction from the center of the top portion to the skirt along a radial axis; and, a lower annular segment extending circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment, the lower annular segment defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt; characterized in that the first and second scoring lines comprise moieties (6M, 6N) on either side of the scoring lines (6d, 6e, 6f), the moieties having curved edges in cross-section profile. a crown cap body comprising: a top portion having a center; a skirt surrounding the top portion, the skirt having angles, wherein the angles terminate at a lower edge defined in a first horizontal plane; an opener assembly (2, 3, 4, 5) mounted to the top portion; a first scoring line extending from the center of the top portion to the lower edge of the skirt in a continuous radial direction; and a second scoring line (6e, 6f) comprising: an upper radial segment extending in a substantially linear direction from the center of the top portion to the skirt along a radial axis; and, a lower annular segment extending circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment, the lower annular segment defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt; characterized in that the first and second scoring lines comprise moieties (6M, 6N) on either side of the scoring lines (6d, 6e, 6f), the moieties having curved edges in cross-section profile. a top portion having a center; a skirt surrounding the top portion, the skirt having angles, wherein the angles terminate at a lower edge defined in a first horizontal plane; an opener assembly (2, 3, 4, 5) mounted to the top portion; a first scoring line extending from the center of the top portion to the lower edge of the skirt in a continuous radial direction; and a second scoring line (6e, 6f) comprising: an upper radial segment extending in a substantially linear direction from the center of the top portion to the skirt along a radial axis; and, a lower annular segment extending circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment, the lower annular segment defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt; an upper radial segment extending in a substantially linear direction from the center of the top portion to the skirt along a radial axis; and, a lower annular segment extending circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment, the lower annular segment defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt; characterized in that the first and second scoring lines comprise moieties (6M, 6N) on either side of the scoring lines (6d, 6e, 6f), the moieties having curved edges in cross-section profile.