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Non-metal tube coupling consisting of a valved male coupling and a valved female coupling, for connecting and disconnecting delivery tubing that conducts liquid to the mouth of an individual as a component part of a portable beverage dispenser for providing liquid to the mouth of an individual including a liquid container, a liquid delivery tube connected to the container and a mouthpiece connected to the liquid delivery tube for positioning in a user's mouth; hydration systems comprising non-metal tube couplings, delivery tubing, and valved dispensers for dispensing the contents of liquid containers for consumption by individuals