A water cooler caddy device for use in conjunction with a water cooler or other beverage dispenser. The water cooler caddy has an arcuate inner surface as an interface with the water bottle and is sized such that it may be placed over the water bottle and slid down so that it either rests on an upper surface of the water cooler, or is supported by the side of the water bottle. The water cooler caddy may have a gap in the circumference so that the radius of the inner surface may be temporarily increased to facilitate installation. Partitions are used to form compartments to contain service items.