Abstract: A recreational water bottle system which includes a primary vessel for holding liquids, a watertight cap having a bottle tube extending therethrough into the primary vessel, a drinking tube for delivering liquids to a user, and an oversleeve adapter disposed between the bottle tube and the drinking tube for passing liquids and for selectively holding the bottle tube and the drinking tube in structural alignment. The system is adapted to be selectively mounted onto the frame of a bicycle or onto the body of an athlete, or used as a hand held sport bottle.