It's possible to make your own soda, but KFC's cola is provided by Pepsi and other related companies not to do it yourself. Homemade soda Raw material recipe (a bottle) 1.5 grams of baking soda 1.5 grams of citric acid (or tartaric acid) 1.5 grams of granulated sugar, a little Juice in moderation Preparation method Use a clean soda bottle, pour cold water into the bottle, not too full, add some sugar and a certain amount of fruit juice. Then put in 1.5 grams of baking soda, and finally 1.5 grams of citric acid (or tartaric acid), and immediately use the stopper to tighten the mouth of the bottle, and tie the stopper tightly with a thin rope or aluminum wire, so as not to wash out the soda. Gently shake the bottle, the bottle produces a large number of bubbles, constantly rolling up and down, after about 20 minutes can be drunk. If you sweat more comrades, can not make fruit juice soda but the production of salt soda, the same method, only the sugar and fruit juice into the right amount of salt can be. Just in case, the best way to make soda is to wrap the bottle with a cloth. Production method Baking soda and citric acid (or tartaric acid), through the chemical reaction to generate a large amount of carbon dioxide, carbon dioxide in the pressure under the action of a large number of dissolved in water. Reduce the pressure, carbon dioxide will run out of water, when drinking soda, the stomach and intestines do not absorb carbon dioxide, carbon dioxide from the mouth to take away a lot of heat, so that people feel cool.