How to Use？ No batteries or other electric resources, how does the soda streaming machine turn water into soda water in seconds? The CO2 cylinder you screw into the soda maker is the power source. When you press the release button, the gas pressurized in the cylinder will be released through the machine into the sealed Pet Bottle. And provide enough sparkle for your water. SNLIDE Soda Water Maker doesn't come with a CO2 cylinder UNLESS shown as a With CO2 Cylinder version. Please refer to "What's in the Package" on the product detail page. You will need to purchase CO2 cylinders separately if you don't already have one. We recommend using SNLIDE CO2 cylinders or other standard 60L CO2 cylinders on the market. If you not sure about the model, please feel free to ask us. We also recommend having 2 of these cylinders so you can give yourself a little time to replace them when one becomes empty. Think of it like a propane tank and your BBQ. Why choose SNLIDE Sparkling Water Maker? A Better Choice of Healthy Life. You can turn water into sparkling water in a few seconds. Rather than buy many soft drinks, you can make them at home, which is healthier.No need to throw away the plastic bottle. Save Money. Each 60L cylinder can make up to 16 gallons of sparkling water(about 180 bottles of 11 oz water).Buying SNLIDE soda water maker, you will also have 1L Pet Bottle with a cap. You can take it to the gym, school, or company and carry it out with the outdoor activity. No need to buy sparkling water during working out.High-Quality & Simple and Stylish Appearance. You can place the soda water making machine anywhere at home, in the study room, in the gym. It can be perfectly matched in each scenario.Create Fun!! You can create your drink recipes, such as Mojito, Lemonade, Fruit Sparkling Ice Tea, or any soft drink flavor. You can have them all at home!Create your pet bottle and machine as well! Everyone who buy the SNLIDE Home Use Soda Maker, you will receive several cute stickers in the package. You can stick them on the pet bottle or on the machine. You will have your one and the only sparkling water!!