With the SodaStream ART Black + 2 Bottles, you can make a supply of sparkling water, thanks to the 2 extra included bottles. You can easily add bubbles to your sparkling water by pressing the handle. You click the included 1L bottle into the machine. You add carbon dioxide by pressing the handle down. The more you do this, the more bubbles you create. That way, you can adjust the added amount of carbon dioxide to your liking. The included CO2 cylinder is enough for about 60L of sparkling water. You can easily click the cylinder into the machine thanks to the Quick Connect technology. The 1L bottles are reusable, so you don't use as much plastic. After use, you can easily clean the bottle in the dishwasher.