Abstract: A flexible and disposable water bottle adapted to be used with water coolers and dispenser has a generally cylindrical body joined to a conical neck and a flat base. A removable cap threaded on the upper end of the neck closes the opening into the chamber of the bottle. The neck has an inwardly directed shoulder engageable with an annular seal mounted on a dispenser when the bottle is in the inverted installed position. The shoulder is positioned in annular surface sealing engagement with the seal. The side and base of the bottle have normally disposed handles to facilitate the mounting of the bottle on the dispenser.