We buy our water in the 5 gallon size for $2.50 at the Water Store. The they also, sells the water coolers, but we purchsed ours from Kmart because it was a more reasonable price. The Water Store will also rent water coolers and deliver the 5 gallon jugs to businesses.
PROS: Reasonable price for a 5 gallon jug of water
CONS: The water coolers that they sell are more expensive
more