Patent ID: 7789227

Claim:
A handheld storage and mixing device, comprising first and second separate containers each defining a distinct internal cavity, the first container being rotatable relative to the second container between a first position in which the cavities are substantially sealed from one another and a second position in which a first gas forming ingredient in one of the cavities can mix with a second gas forming ingredient in the other cavity to form a gas, the device further comprising one or more filtered openings to allow the gas to escape into the ambient environment, wherein the first and second containers have opposing faces with non-circular perimeters, the face of the first container covers substantially all of the face of the second container when the first container is in the first position relative to the second container and when the first container is in the second position relative to the second container, and portions of the face of the second container are uncovered when the first container is rotated relative to the second container between the first position and the second position.