A hydration device has a flexible bladder constructed to have a plurality of expandable liquid receiving chambers that extend laterally across the width of the bladder and are spaced from one another along the length of the bladder. Liquid conveying tubes are in fluidic communication with liquid chambers. A coupling is fluidically connected to the tubes and includes a valve that operates to seal the coupling from the tubes. A drinking tube has a first end that is fluidically connected to the coupling thereby establishing a fluidic connection between the drinking tube and the tubes. A bite valve is connected to a second end of the drinking tube and is operable to allow a user to drink liquid from the chambers. The drinking tube may be secured to a user's wrist by a wrist strap.