Container closure with additive reservoir

摘要

A closure with an additive reservoir is mounted on a container for a consumable liquid. The closure has a base, which includes the additive reservoir; a spout mounted on the base; a plunger positioned in the additive reservoir, and an outer cap. Upon advancing the plunger, an additive in the reservoir is released into the consumable liquid after the additive or plunger ruptures or otherwise opens a barrier provided by a foil, membrane or plug. Upon moving the spout from a first position on the base to a second position, a passageway through the base is opened and the consumable liquid flows to the consumer without having to remove the closure. The additive chamber is mounted in a support column of the base with the passageway for the consumable liquid being disposed between the additive chamber and the support column. In a preferred embodiment the additive is the sole pressure link between the plunger and barrier.