A closure comprising: an inner shell comprising: a. a first upper portion having an outer surface; and b. a first lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the first upper portion, the annular side wall of the first lower portion having an outer surface and a first inner surface, the outer surface of the first lower portion comprising one or more inner shell cams projecting outwardly from the outer surface; an outer shell rotatably housing the inner shell, the outer shell comprising: a. a second upper portion having an inner surface; b. a second lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the second upper portion, the annular side wall having a second inner surface comprising: i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface; and ii. wing recess areas disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface. an inner shell comprising: a. a first upper portion having an outer surface; and b. a first lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the first upper portion, the annular side wall of the first lower portion having an outer surface and a first inner surface, the outer surface of the first lower portion comprising one or more inner shell cams projecting outwardly from the outer surface; a. a first upper portion having an outer surface; and b. a first lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the first upper portion, the annular side wall of the first lower portion having an outer surface and a first inner surface, the outer surface of the first lower portion comprising one or more inner shell cams projecting outwardly from the outer surface; an outer shell rotatably housing the inner shell, the outer shell comprising: a. a second upper portion having an inner surface; b. a second lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the second upper portion, the annular side wall having a second inner surface comprising: i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface; and ii. wing recess areas disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface. a. a second upper portion having an inner surface; b. a second lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the second upper portion, the annular side wall having a second inner surface comprising: i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface; and ii. wing recess areas disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface. i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface; and ii. wing recess areas disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface.