Embodiments of the present disclosure include a container additive system that can be used to mix an additive separately contained inside a receptacle with the contents of a container. The system can enable separate transport of additives for the contents of the container in a sterile and convenient manner that enables mixing according to a user's preferences before the opening of the container and dispensing. According to some aspects, the system can include a breacher configured to connect the insides of the container and receptacle. The receptacle may be rigid, flexible bag type container or a hybrid thereof, depending on the application and side of the additive. In some embodiments, the system or parts thereof may serve as a cap or lid to the container. The container is also not limited to rigid or semi rigid surfaces but can also include flexible bag type or hybrids of flexible and rigid surfaces.