• How do I insert the cylinder into my DUO Sparkling Water Maker?
• Will I be able to exchange my old Sparkling Water Maker for one with the new system?
• How do I clean my carbonating bottles?
• How do I clean and handle my DUO Sparkling Water Maker?
• How do I carbonate water using my DUO Sparkling Water Maker?
• In your new machine, you claim that there is a to go bottle, but it just looks like a normal bottle. How long will the water stay fresh?
• Will you take back my old machine (for recycling and/or environmentally friendly disposal) when I exchange it with a new DUO?
• What happens to my old machine when I buy the DUO? What am I supposed to do with my 5 Crystal bottles, which do not fit into the machine?
• Does the new DUO need more CO2 than before?
• Why are you launching a new machine that does not fit all SodaStream carbonating bottles?
• Is the DUO glass carafe compatible with my Crystal Sparkling Water Maker? 
• Are existing products (bottles, cylinders) compatible with the new DUO?
• How are sustainability aspects of your brand reflected in DUO?
• Will there also be an electric version of the DUO?
• How does the new Sparkling Water Maker differ from your already existing products?
• Do cylinders from other brands/supplier’s fit into the new DUO?
• Can I use my old cylinders with the new DUO?
• What is the difference between the DUO system and the existing Sparkling Water Maker’s systems?
• What is the reason for a new machine? Why are you launching the Sparkling Water Maker right now?
• Why should I purchase a DUO?
• Why the name DUO?