Abstract: A container cap having a dispensing capsule for mixing ingredients at the time of use to extend shelf life. The device involves having a cap body having an internal passage; a chamber removably snapped into the internal passage of the cap body, the chamber including a flexible actuator and a sealing member sealing a lower portion of the chamber; a drinking spout slidingly engaged with a top portion of the flexible actuator of the chamber; a hollow plunger slidingly disposed within the chamber. The hollow plunger engages the flexible actuator of the chamber and the flexible actuator is configured to deform and engage the hollow plunger, causing the hollow plunger to puncture the frangible sealing member, dispensing an ingredient stored in the chamber. A resilient seal is inside the flexible actuator and a piercing member in the drinking spout is configured to puncture said resilient seal when the drinking spout is engaged downward. A drink-through channel is prescribed from the chamber through to the spout.