Philips CO2 (Refill)Introducing the Philips CO2 Refill Program A worry free service designed for your convenience. Philips simply exchange your empty CO2 cylinders for new ones, delivered straight to your doorstep. Don't worry about running out of CO2 for your sparkling water! Sign up now for your sparkling lifestyle. Box up & mail empties Join the Philips Refill Program by signing up for an account and order a free refill box. Once you do that, you won't need to log