A system for closing containers of the bottle and/or jar type, which also dispenses active formulas from an airtight tubular space in its interior, into liquid or other content of a container when a mix is required. The system includes a movable push-cut carriage that is driven mechanically by an external puller to cut the seals of the tubular space and push the active formulas towards the interior of a bottle or jar. The closing system can be used for the incorporation of elements such as vitamins or minerals, which need to be stored separately from the content of the container in order to increase their useful life and improve their effectiveness, and in medical and/or pharmacological applications, to form mixtures of active formulas when they are required, thereby avoiding the rapid degradation of the final composition.