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A soda maker adds carbon dioxide to water to create carbonated water, or what some people call “fizzy” or “sparkling” water. You can then add syrup to the carbonated water to create flavored soda.
You can use tap water as a base for the soda, but you’ll need to buy syrups for flavored soda.
Depending on the type of soda machine you own, you’ll also need to purchase carbon dioxide cartridges, tablets, or pods to inject the carbonation into the water.