PURPOSE: To provide at a low cost a spout equipped with a replenishment- preventing function that prevents a used container for liquid from being replenished therethrough with similar substance. ;CONSTITUTION: A spout is composed of a cylindrical part 3, extending to the outside and the inside of a container, and a working valve-equipped plastic member formed integrally of the working valves to be fitted to a flange provided to the periphery of the cylindrical part 3 and the end of the cylindrical part 3 on the inside of the container and a working valve support part 8. In the working valve-equipped plastic member, semicircular working valves 11 are arranged symmetrically on the right and the left through two hinges 9 arranged along both side walls of the working valve support part 8 approximately in a rectangular parallelepiped, and the working valves 11 are made available for bending toward the outside of the container.;COPYRIGHT: (C)1996,JPO
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