Self opening pour spout and screw cap

A pour spout and container construction adapted for barrier packaging of liquids and or powders, including a closed container having an exterior and an interior surface, one portion of said container having an opening therethrough to thereby define a dispensing opening, a barrier layer on said interior surface completely spanning and covering said dispensing opening, an annular pour spout rigidly mounted on said container, said pour spout having a spout passageway at least partially aligned with said dispensing opening, a cap releasably mounted on and carried by said pour spout by means of interengaging screw threads on said cap and said pour spout, said cap normally closing said pour spout, said cap including an innermost annular skirt integral therewith, said innermost skirt having a lower edge, said innermost skirt positioned interiorly of said pour spout, said innermost skirt lower edge being adhered to a portion of said dispensing opening spanning barrier layer, whereby when the cap is removed from the pour spout by unscrewing the cap, the barrier layer is ruptured to thereby permit dispensing of any contents of the container through the dispensing opening.