To provide a drink port formed on a laminate bag wherein the drink port comprises a cap and a nozzle by integral molding, the port is opened by pulling off the cap, liquid contents can be ejected without contaminating surroundings such as an outer face of the bag and a hand, and the cap can be temporarily closed with the nozzle by locking and reliably closed by seal fitting.

A bag comprises a nozzle for taking liquid contents in the bag 2 and a cap 4 to be put over the nozzle 3 integrally molded, wherein the nozzle for connecting a top outer face of the cap 4 with an upper end tip of the nozzle 3 via a thin part 7 comprises a nozzle cylinder 8 to be put into a mouth and a bag joining flange 9 to be held in an adhesive rim of the bag 2, while the cap 4 comprises a skirt 41 for seal-fitting an inner peripheral face to an outer periphery of the nozzle cylinder 8 and a top equipped with a locking ring 44 inside the thin part 7 for locking to an opening rim of the nozzle cylinder 8, thereby forming a drink port of the laminate bag.