PUR has taken the charcoal filtering technology found in their refrigerator pitchers and placed it in a full-sized water cooler. The design offers tremendous user benefits. For instance, instead of unsightly five-gallon containers that are difficult to hoist onto the cooler, PUR's three-gallon water reservoir (which is filled by the user with tap water) has a rectangular shape with handles on each side for easier lifting. And since the cooler sits lower than most units, the height to which the water needs to be lifted is significantly reduced.