Turn the water from your faucet into carbonated water easily, with the SodaStream Spirit Black. You can easily control exactly how much carbonic acid to pump into the water. The more often you press the button, the more carbonated the water wil become. Collect the carbonated water in 1 of the 3 included 1-liter plastic bottles, which you can easily click in and out of the sparkling water machine. Pop on a cap, then pop it in your bag. You can make up to 60 liters of carbonated water with 1 CO2 cylinder, which is up to 5 times cheaper than a weekly purchase of liter bottles at the supermarket. On top of that, it's up to 5 times cheaper than when you buy weekly 1-liter bottles at the supermarket; heavy bottles which you won't have to drag home anymore either. How convenient.