A water cooler, also known as a water dispenser, is a machine that dispenses drinking water. It is usually found in offices, schools, and other pubpc places. It typically has a large water tank that is connected to a water supply, and a spout or faucet that dispenses the water. Some water coolers also have a refrigeration system to keep the water cold. To use a water cooler, you typically fill a cup or bottle with water from the spout or faucet. Some water coolers also have a hot water spout for making hot beverages pke tea or coffee.