Patent ID: 7055709

Claim:
In combination: a fluid receptacle having a coupling and an opening from an exterior of said fluid receptacle to an interior of said fluid receptacle, said opening permitting fluid to pass between said fluid receptacle interior and exterior; a cover having a coupling co-operative with said fluid receptacle coupling, said cover preventing fluid from passing between said fluid receptacle interior and exterior when said cover coupling is coupled to said fluid receptacle coupling in a closing coupled relation and further removable entirely from said fluid receptacle coupling to open said receptacle opening; and a special receptacle cap removably holding a first composition adjacent said fluid receptacle and separating said fluid receptacle coupling from said cover coupling, said special receptacle cap comprising: a divider wall; a first coupling affixed to said divider wall and co-operative with said fluid receptacle coupling, said divider wall cooperative with said fluid receptacle to prevent fluid from passing between said fluid receptacle interior and exterior when said special receptacle cap first coupling is coupled to said fluid receptacle coupling in a closing coupled relation, said first coupling further removable entirely from said fluid receptacle coupling to separate said divider wall from said fluid receptacle and thereby open said receptacle opening; a second coupling affixed to said divider wall engaging with said cover coupling in a closing coupled relation to form an enclosed chamber isolated from said receptacle and at least partially releasing to open said enclosed chamber.