Patent ID: 8276785

Claim:
A hydration system for providing fluid to a user, comprising: a bladder configured to hold a fluid; a multilayer outer protective skin surrounding said bladder, wherein the skin comprises a layer of a chemically resistant composite; a spout connected to the bladder and in communication with the inside of the bladder, comprising a fill port for filling the bladder with fluid; and a tube connected to the bladder and in communication with the inside of the bladder, having a first end connected to an exit port of the bladder and having a second end connected to a fluid delivery fitting, wherein the spout further comprises a multi-part closure fitting that extends at least partially into the bladder and includes an opening through which fluid may enter or exit the bladder, the closure fitting comprising: a base portion, said base portion further comprising a cylindrical neck with an opening therethrough, said cylindrical neck having a first threaded surface on an outer surface of said neck, and a second threaded surface on an inner surface of said neck; and a seal flange attached to one end of the neck, said seal flange extending substantially perpendicular to a longitudinal axis of said neck; a sealing closure portion, said sealing closure portion further comprising a cylindrical body with an opening therethrough, said cylindrical body having a threaded surface on an inner surface of said body, said threaded surface on the inner surface of said body being sized and configured to mate with the threaded surface on the outer surface of said neck; a bottom flange attached to a bottom end of said body, said bottom flange extending substantially perpendicular to a longitudinal axis of said body; and a top flange attached to a top end of said body, said top flange extending substantially perpendicular to a longitudinal axis of said body; and a filler cap adapted to engage and close the fill port, said filler cap further comprising a cylindrical part, said cylindrical part having a threaded surface on an outer surface of said part, said threaded surface on the outer surface of said part being sized and configured to mate with the threaded surface on the inner surface of said neck; and a cap flange attached to a top end of said part, said cap flange extending substantially perpendicular to a longitudinal axis of said part; wherein said seal flange is designed to fit through an opening in the bladder, and wherein said seal flange further comprises one or more indentations to tighten a connection between the base portion and the sealing closure portion.