Container closure

A liquid container closure comprising

• a cap including a top wall having a perimeter edge, a grip support extending around the top wall, and an annular skirt depending from the grip support and cooperating with the top wall and the grip support to define an interior region of the cap, the grip support and the perimeter edge of the top wall cooperating to form an annular channel, the grip support being formed to include extrusion holes providing passageways communicating with the annular channel and the interior region of the cap,
• a monolithic compliant member including a cap liner located in the interior region of the cap to contact the top wall, a grip ring located in the annular channel to lie outside of the interior region of the cap, and extrusion posts coupled at one end to the cap liner and at another end to the grip ring and arranged to extend through the extrusion holes formed in the grip support to tether the cap liner to the grip ring and retain the monolithic compliant member on the cap
• wherein the annular skirt includes an annular upper edge, the grip support includes an annular lateral wall extending away from the perimeter edge of the top wall and mating with the annular upper edge of the annular skirt, and wherein the perimeter edge of the top wall and an exterior surface of the annular lateral wall cooperate to define a boundary of the annular channel formed in the cap and engage the grip ring located in the annular channel, and
• wherein the annular lateral wall terminates at an outer edge, the grip support also includes an annular upright wall extending from the outer edge of the annular lateral wall downwardly to mate with the annular upper edge of the annular skirt, the annular upper edge of the annular skirt, the perimeter edge of the top wall, exterior surfaces of the annular lateral and upright walls, and the annular upper edge of the annular skirt cooperate to define a boundary of the annular channel and wherein each of the annular skirt and annular upright wall is arranged to extend in a vertical direction, each of the top wall and the annular lateral wall is arranged to extend in a horizontal direction to lie in orthogonal relation to the annular upright wall, and one of the annular upright and annular lateral walls is formed to include the extrusion holes.