Dispenser having attached and sealed closure cap

In an assembly including a dispenser having a continuous cylindrical connecting portion, a closure cap in engagement with said connecting portion, said cap threadedly engaging the neck of a container of fluid to be dispensed, the improvement wherein interengaging means are provided on said cap and on said portion for positively retaining said dispenser and said closure cap together in a fluid tight manner, said means solely comprising an annular flange on said connecting portion and a flexible conical skirt on said cap, said flange including an upper wall extending radially outwardly, said skirt extending toward said wall and positively engaging the inner terminal end of said flange, and said container neck underlying said skirt, whereby said interengaging means defines a snap-fit engagement between said cap and said connecting portion incapable of disassembly upon threaded engagement between said cap and said neck, and whereby, upon a tightening of the closure cap on the container neck, positive engagement between said conical skirt and said inner terminal end of said flange is improved as the free end of the skirt moves radially inwardly into the root end of the flange in response to said tightening action of the cap and fluid-tight seals are defined between said cap and said portion and between said cap and said container neck.