5-gallon bottle of PURE Drinking Water. This bottle has been sterilized inside and out with state-of-the-art equipment. Our water is Purified through Reverse Osmosis and is both UV Sterilized and Ozonated. 5-gallon refill requires an empty 5gallon bottle. If you do not have an empty 5-gallon bottle please purchase  'new' bottle and once' that is empty you may then purchase 'refills' to replace it.