Some water dispensers deliver clean and filtered water from a replaceable bottle.Here are some of the functions of water dispensers: What are the different functions of the water dispenser? Almost all offices prefer to have a water dispenser because it provides convenient access to water for clients and employees, and it avoids taking extended breaks or driving to the store, thus allowing for increased productivity in the office. A water dispenser is a device that dispenses water as per demand such as normal, cold or hot water. A lot of amusing conversations and long lasting friendships in fact, begin by its side. Water dispensers or water coolers are a part of the everyday life to provide easy access to drinking water to the office employees.