Get more out of your SodaStream with the matching SodaStream accessories. That way, you won't be without sparkling with extra SodaStream CO2 cylinders. With the extra SodaStream bottles, you can make an extra supply of sparkling water. These bottles are lightweight, so you can also easily take them with you on the go. Is your SodaStream cylinder empty? Exchange it for carbon dioxide at a SodaStream exchange point for a fee.