A manually extendible plastic spout for use in combination with the closure for an industrial container. The spout has a peripheral flange with a U-shaped channel which receives a downwardly extending flange on the closure so that the spout is installed from the bottom side of the closure rather than according to the more customary top-mounted procedure. The body of the spout is pleated and has an outlet collar which is threaded to receive a cap having a pull-ring, an integral internal seal is also provided. The spout can be extended to any of several stable positions or conditions.