Guy in the office next to me was paying $50/mo for bottled water at the store for his family and lugging it home. I turned him on to our scheme. He bought a water cooler for $50 and once or twice a month a boy will deliver, on demand (from three blocks away), a big bottle of spring water for about $5 plus 50cent tip for delivery. Our boy even carries it up four flights of stairs since the elevator doesn't come to the service entrance...