The Lot of 2 Empty SodaStream 60L CO2 Cylinder Replacement Canister is a set of two multicolor aluminum cylinders designed for use with SodaStream soda makers. These co2 bottles are specifically made for the SodaStream 60L model and come with co2 replacements included. With a width of 2.5 inches, this product is essential for maintaining and refreshing your SodaStream machine for continued use in making your favorite beverages at home.