Culligan- Overview Culligan rents the industry leading bottleless ice & water purifier, to commercial establishments such as office buildings, manufacturing facilities, medical/dental centers, hospitality, warehousing and any general business, that transforms normal tap water into refreshing purified drinking water thru our exclusive Culligan purification process. This “high end” purifier is an alternative to single use plastic bottles of water, antiquated water fountains, 5-gallon bottle water coolers and cheap filter machines.