Abstract: Dual containers having a valve mechanism that cuts off or provides communication between their internal areas to store and separate different content from each other until it is desired to mix the two contents together. A first valve embodiment incorporates a push/pull configuration, which is pulled to an opened position for allowing the two previously separated contents to be mixed together. In a second valve mechanism embodiment a twist configuration is provided. Thus, when the first container is turned to a certain position a through aperture of the first container can be aligned with a through aperture of the second container. In third valve mechanism a blocking member assembly and positioning lever is provided with each container secured to the blocking member assembly. An outlet can be provided on either container for exiting the mixed contents.