How can I start fermenting soda at home?

To start fermenting soda at home, you will need to create a mixture of sugar, water, and flavorings, such as fruit or herbs. Add a small amount of yeast to the mixture to kickstart the fermentation process. Allow the mixture to ferment in a sealed container for a few days, then strain out any solids and transfer the liquid to bottles for carbonation. Let the bottles sit at room temperature for a few more days before refrigerating and enjoying your homemade fermented soda.