It is ok to make your own soda, but KFC's cola is provided by Pepsi and other related companies, not by yourself. Self-made soda raw material formula (bottle) baking soda 1.5g citric acid (or tartaric acid) 1.5g sugar and a little juice. How to make it? In a clean soda bottle, pour cold boiled water into the bottle, not too full, and add some sugar and a certain amount of juice. Then add 1.5g baking soda, and finally add 1.5g citric acid (or tartaric acid), immediately plug the bottle mouth, and tie the plug tightly with string or aluminum wire to prevent the soda from rushing out. Shake the bottle gently, a lot of bubbles will be generated in the bottle, and it will roll up and down continuously, and it can be drunk in about 20 minutes. If you sweat a lot, you can make salt soda instead of juice soda. The method is the same, just change the sugar and juice into the right amount of salt. Just in case, it is best to wrap the soda bottle with cloth when making soda. Production method Baking soda reacts with citric acid (or tartaric acid) to generate a large amount of carbon dioxide, which is dissolved in water under pressure. Reduce the pressure and carbon dioxide will run out of the water in large quantities. When drinking soda, the stomach will not absorb carbon dioxide, and carbon dioxide will run out of the mouth, taking away a lot of heat and making people feel cool.