A flexible container comprising: a flexible front sheet and a flexible rear sheet attached to one another along at least one edge, a container port; characterized in that the container port comprises a nozzle integrally molded to an attachment flange disposed in between the flexible front sheet and rear sheet; wherein the attachment flange comprises: a first attachment flange layer comprising an interior surface and an exterior surface and a second attachment flange layer comprising an interior surface and an exterior surface attached to one another along at least one common edge, a fin extending from the at least one common edge where the first and second attachment flange layers (62, 64) are attached comprising a first thickness adjacent the first and second attachment flange layers (62, 64) and a second thickness remote from the first thickness, the first thickness being larger than the second thickness; a first configuration comprising the two interior surfaces of the first and second attachment flange layers (62, 64) contacting one another, at least in part, when positioned in between the flexible front and rear sheets (16, 18) and heat sealed to the flexible front sheet and rear sheet with at least one heat bar, and a second configuration comprising the two interior surfaces spaced apart from one another at a location away from the at least one edge when the at least one heat bar is removed. a flexible front sheet and a flexible rear sheet attached to one another along at least one edge, a container port; characterized in that the container port comprises a nozzle integrally molded to an attachment flange disposed in between the flexible front sheet and rear sheet; wherein the attachment flange comprises: a first attachment flange layer comprising an interior surface and an exterior surface and a second attachment flange layer comprising an interior surface and an exterior surface attached to one another along at least one common edge, a fin extending from the at least one common edge where the first and second attachment flange layers (62, 64) are attached comprising a first thickness adjacent the first and second attachment flange layers (62, 64) and a second thickness remote from the first thickness, the first thickness being larger than the second thickness; a first configuration comprising the two interior surfaces of the first and second attachment flange layers (62, 64) contacting one another, at least in part, when positioned in between the flexible front and rear sheets (16, 18) and heat sealed to the flexible front sheet and rear sheet with at least one heat bar, and a second configuration comprising the two interior surfaces spaced apart from one another at a location away from the at least one edge when the at least one heat bar is removed. a first attachment flange layer comprising an interior surface and an exterior surface and a second attachment flange layer comprising an interior surface and an exterior surface attached to one another along at least one common edge, a fin extending from the at least one common edge where the first and second attachment flange layers (62, 64) are attached comprising a first thickness adjacent the first and second attachment flange layers (62, 64) and a second thickness remote from the first thickness, the first thickness being larger than the second thickness; a first configuration comprising the two interior surfaces of the first and second attachment flange layers (62, 64) contacting one another, at least in part, when positioned in between the flexible front and rear sheets (16, 18) and heat sealed to the flexible front sheet and rear sheet with at least one heat bar, and a second configuration comprising the two interior surfaces spaced apart from one another at a location away from the at least one edge when the at least one heat bar is removed.