US Patent 7967135 Bifurcated beverage can with unified opening and mixing operation

A beverage can having a primary fluid volume and a segregated secondary container. The secondary container could contain a liquid or a granulated solid. The two containers are separated by a barrier which can be opened. The beverage can has a lid with a conventional pull-tab and downward-opening hatch. However, the hatch is equipped with a piercer extending down into the can. When the pull-tab is actuated, the piercer breaches the barrier separating the secondary container from the primary fluid volume. The contents of the secondary container can then be mixed with the primary fluid.