A fitting for affixing to a mouth portion of a receiving container and for receiving a drinking straw comprises a tubular body including a side wall having an inner surface and an outer surface, an open bottom end and a closed top end formed by a top wall having a frangible region therein configured to permit passage of the drinking straw therethrough. A seal layer is coupled to the closed top end and is configured to overlap the frangible region. The fitting may also be mounted onto a container body including a container side wall, an integral container bottom wall and an open top end defined by an open mouth portion. A drinking straw may be releasably coupled to the container body.