Abstract: An insertable adaptor for providing a cylindrical container with a funnel and sump for collecting stored liquid centrally within the container. Preferably, the adaptor is generally in the form of a modified torus, having an inclined top wall forming a funnel, a sump for accumulating liquids collected by the funnel, an outer wall cooperating with the cylindrical wall of the container, and a bottom wall. The adapter is preferably formed monolithically, so that a hollow interior is defined by the adaptor, the hollow interior being impervious to infiltration by the stored liquid. A flexible flange projects outwardly from the adaptor, so that the adaptor resists upward displacement within the container after being forced to the bottom of the container. The sump accommodates a pickup tube of a vacuum or force operated spraying or dispensing apparatus utilizing the container as a storage receptacle for liquid to be sprayed or dispensed.