NOTE: The cylinder is empty and does not contain CO2 gas. Cool and Healthy: Our sparkling water maker allows you to craft your own natural soda water, reducing bodily stress while offering a refreshing, healthy, and energizing drink. Enjoy creating a variety of colorful beverages anytime, anywhere, indulging in the joy of making soda water, juice, wine, cocktails, or beer. It also makes a great gift to share happiness with friends. Instant Enjoyment: All you need to do is fill the bottle with clean, cold water, screw in a 60L CO2 cylinder, and press the carbonation button for 2-3 seconds to achieve your desired taste of richly flavored, cool, bubbly water. With a dissolution rate of up to 60%, this soda maker machine provides you with full-bodied bubbles and a cool taste. However, please ensure not to carbonate for more than 5 seconds at a time and use cold water between 4-5°C for richer bubbles and a better taste. Cost-effective and Sustainable: We provide you with 1 1L food-grade PET bottle with caps for convenient storage. This sparkling water and soda maker includes 1 CO2 cylinder (the cylinder is empty and does not contain CO2 gas). With a replaceable cylinder design compatible with mainstream soda brands' 60L CO2 cylinders, one cylinder can make 180 bottles of soda water (330ml per bottle), making it more economical and eco-friendly for repeated use.