Abstract: A system is described for connecting a bottle to a shower dispenser, which enables connection with only a small angle of turning, which latches the bottle in position while permitting detachment, and which avoids leakage of material during dispensing. The bottle, or container, has a cam on its neck, and the shower dispenser receiver into which the container can be screwed has a slot forming a detent that is deflected by the cam as the container is turned, to resist unscrewing of the container. The bottom of the slot that forms the detent, also forms a stop that prevents further screwing in of the container. The receiver has an internal cylindrical projection that is closely received within the container neck, and which substantially abuts an internal flange within the container, to minimize leakage of liquid during dispensing.