A dispensing cap sealingly mountable within the throat of a beverage containerhas an open-bottomed flow tube connected to a surrounding skirt by a resilientdiaphragm, forming a reservoir surrounding the flow tube. A membrane attachedto theperiphery of the skirt seals off the bottom of the reservoir. The lower end ofthe flowtube extends into the reservoir and is adapted for piercing the membrane. Adownwardforce applied to the flow tube will resiliently deform the diaphragm, causingthe lowerend of the flow tube to pierce the membrane, thus allowing the contents of thereservoirto flow into the container. The flow tube extends above the diaphragm andterminates ina flow assembly operable between a closed position and a "consume" position inwhichthe contents of the container can flow through the flow tube and out anopening in the capsleeve.
