Patent ID: 7377383

Claim:
A mating pair of first and second chamber members which are connectable to form a mixing container, said first chamber member having a threaded port, a first frangible member sealingly closing an inner end of said port, said second chamber member having a threaded neck adapted for threadedly engaging said port to thereby define a threaded connection of said first and second chamber members, a second frangible member sealingly closing an outer end of said neck, a breaking member on said first frangible member for breaking said second frangible member, wherein each of said first and second chamber members is composed of molded plastic and wherein at least one of said first and second frangible members is integrally molded with a respective one of said first and second chamber members, whereby said neck can be threadedly advanced in said port to effect breakage of said first frangible member by said neck and to effect breakage of said second frangible member by said breaking member on said first frangible member to allow flow of contents between said first and second chamber members, wherein said port has a cylindrical wall, and a score line molded into and extending partially around said first frangible member thereby defining a breakaway disc having an unscored hinge portion, said breakaway disc, being slanted relative to said port cylindrical wall to allow initial contact by said neck with said breakaway disc at a location opposite said unscored hinge portion.