Abstract: The apparatus of this invention is for dispensing two liquids so that the ratio K of the flow rates of the liquids is substantially constant. The apparatus comprises two containers each having a dispensing orifice and an air vent passage having two ends, an inlet end at the outside surface of the container and an outlet end inside the container. In the preferred embodiment, the containers are geometrically proportional in shape with the dispensing or pouring orifices and vent passages all in corresponding locations. The ratio of the cross-sectional areas of the pouring orifices of the two containers is C K.sup.5/6 where C is the ratio of the flow coefficients of the two liquids to be poured.

Abstract: A combined container and dispenser for dispensing a volatile product such as air freshener or insecticide by volatilization of the product from within the container includes an annular cup having a threaded axial hub and a peripheral flange defining a seal surface. A spheroidal cap has a threaded axial stem arranged for progressive threaded coupling with the hub and an annular seal ring disposed at the outer edge of the cap and arranged to sealingly engage the seal surface of the cup to form a sealed container therewith. A cellulose pad impregnated with a volatile product is disposed on ribs provided on the hub in interference relationship therewith and has its outer edge supported by vane-like support members on the outer portion of the cup. A flange is provided on the distal end of the stem within a counterbore formed in the bottom of the cup and hub to limit the extent to which the container may be opened by unscrewing of the cap from the cup.