The SodaStream cylinders contain only harmless carbon dioxide (CO2). SodaStream maintains the highest quality standards and ensures the safety and security of all CO2 cylinders. During production, filling, and refilling, each cylinder is carefully and individually inspected by both operators and machines.
Carbon dioxide is the only energy source required to carbonate water or beverages. The machine operates without batteries or electricity. You don’t even need much effort: a 425-gram cylinder weighs 150 times less than the drinks you would have had to carry home from the store!