PROBLEM TO BE SOLVED: To provide a soft drink packed in a sealed container, where only objective food additives are fed to raw material water from outside, the water not being subjected to a sterilization treatment by chemicals such as a dechlorination treatment.SOLUTION: Natural water and food additives are fed into a tank and agitated into a uniform mixture, which is passed through a 1 &mum filter and a 0.2 &mum filter arranged downstream thereof for removal of foreign taste, foreign odor, and impurities. Between an accommodation step at the tank and a container filling step, bacteria can be sterilized in a sterilization step at 85°C for 30 minutes. A soft drink is thus packed in a sealed container, where only objective food additives are fed to raw material water from outside, the water not being subjected to a sterilization treatment by chemicals such as a dechlorination treatment.
