A hydration system for kayak integration includes a deck port configured to allow fluid passage through a deck of a kayak. The system includes a reservoir having an internal sealable compartment configured to contain a liquid under pressure. The reservoir has a first port configured to receive pressurizing gasses into the compartment, a second port, and a third port through which the liquid can be supplied into the compartment. A transfer tube couples the reservoir to the deck port. The transfer tube has a first end configured to be coupled to the second port of the reservoir and a second end configured to be coupled to the deck port at a position within an interior space of the kayak. A pressurizer is configured to be coupled to the first port of the reservoir. The pressurizer is operable to supply the pressurizing gasses. A drinking tube has a first end with a valve and a second end. The second end is configured to be coupled to the deck port at a position exterior to the kayak. When the compartment is sealed and pressurized, activation of the valve unseals the compartment and allows the liquid to be expelled from the compartment via the second port, the transfer tube, and the drinking tube as a result of the pressurization of the compartment by the pressurizing gasses.