(57) @ A closable container, comprising a container, having a throat opening, and a closure
member comprising an elastically distortable seal member having a peripheral bead
portion that is selectively contractible from a first bead diameter to a second, smaller
bead diameter, said bead portion being releasably, sealingly engageable with the inner
surface of the throat opening, said throat opening defining a first wall portion having
a diameter greater than said first bead diameter, a second wall portion that is formed
below and adjacent said first wall portion and has a diameter less than said first
bead diameter and at least equal to said second bead diameter, a first annular ledge
extending inwardly and disposed between said first wall portion and said second wall
portion, and a second annular ledge extending inwardly below said second wall portion.
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