Lightweight hinged-lid closure for a flexible tube

Hinged-lid closure comprising a lid, a base including a plate, an attachment skirt and an external lateral skirt, and a hinge attaching the lid to the base, wherein the attachment skirt is thicker than the plate and the external lateral skirt, and

• wherein the base comprises a single radial longitudinal rib projecting radially from an inner surface of the external lateral skirt at a mid-point of and perpendicular to the hinge, the rib improving mechanical strength of the closure with the lid in an open position, and having a thickness limited to enable the rib to be retained between radial projections on a shoulder of a tube to which the closure is adapted to be attached.