This compact RO (Reverse Osmosis) system is about the size of a small bottle of water and easily connects to faucets with a quick release connecter. Now you can be assured of pure water for drinking, coffee or tea no matter where you go (office, hotel, etc). The Mobile Mini is the portable version of the built-in RO System. This is truly the perfect solution to ensure safe drinking water. The membrane is designed to last all season before replacement and can even be attached to a garden hose.