Patent ID: 7299939

Claim:
A removable cap assembly, comprising: a cap having a curved side wall having an inner surface and an outer surface, a top portion extending from said curved side wall, a boss extending perpendicularly from said top portion, said boss having a bottom and a top, a circumferential rib extending perpendicularly from said top of said boss and at least one ridge on the inside surface of said boss below said top and above said bottom, said boss and rib defining an opening in said cap, said opening having a width and a height; a stopper dimensioned to seal said opening, said stopper having a hole therein configured to allow a fluid to flow therethrough, said stopper being maintained in said cap by said boss and said at least one ridge, said stopper including a disc shaped base, a cylindrical wall portion extending from said base having at least one cavity corresponding to the location of said at least one ridge on said boss, a first groove in said base surrounding said wall portion, said first groove dimensioned to receive said bottom of said boss; and an appliance member adapted to be positioned within said hole and extending through said opening.