Businesses in the water coolers and systems category supply equipment that provides drinking water in workplaces, public buildings and other premises. Products commonly include bottled-water coolers, mains-fed dispensers and units that provide chilled, ambient or hot water. Some systems include filtration or purification equipment, such as filters designed to reduce sediment, chlorine taste or other impurities. Options may include countertop and freestanding models, with different capacities and dispensing controls. Services can include assessing a site's requirements, delivering and installing equipment, connecting mains-fed units to a water supply, and arranging regular servicing. Maintenance may involve cleaning and sanitising the dispenser, replacing filters, checking connections and dealing with faults. For bottled systems, suppliers may also provide bottles and manage replenishment or collection of empty containers.