Patent ID: 8757407

Claim:
A package having child-resistant and non-child-resistant modes of operation, which includes: a container having an end with an open mouth surrounded by a container wall with a central axis and an outer surface surrounding said mouth, and at least one first lock element extending radially outwardly from said wall, and a closure that includes an annular base wall having inner and outer peripheral edges, a cylindrical skirt extending from said outer peripheral edge of said base wall, at least one second lock element on said skirt, and a projection extending axially from said inner peripheral edge of said base wall in a direction opposite from said skirt, said projection having an annular sidewall spaced radially inwardly from said outer peripheral edge of said skirt, said closure being adapted to be secured to said container in a child-resistant mode of operation with said at least one second lock element on said skirt releasably engaged with said at least one first lock element on said container wall, and with said inner peripheral edge of said base wall in engagement with said outer surface of said container wall to bias said lock elements in engagement with each other and to seal said package, said closure being adapted to be secured to said container in a non-child-resistant mode of operation with said annular sidewall of said projection received in plug-sealing engagement within said container mouth, said closure including a wall extending from said outer peripheral edge of said base wall, said wall being of sufficient length to radially outwardly cover said at least one first lock element on said container by extending axially below said at least one first lock element when said projection is received within the container mouth, said container wall being radially resiliently flexible around said mouth, flexing radially inwardly from engagement with said inner peripheral edge of said base wall in said child-resistant mode of operation and radially outwardly from engagement with said annular wall in said non-child-resistant mode of operation, said container including an internal channel in said container wall adjacent to an end of said container wall to facilitate inward flexure of said wall around said mouth.