There are two ways to avoid food spoilage caused by bacterial reproduction. One is to prevent bacteria from living in food. This can be achieved by adding preservatives that can inhibit the growth of bacteria, such as potassium sorbate; Or reduce the available moisture in food, such as traditional air-dried bacon. Secondly, it is to kill the original bacteria in food first, and then use appropriate packaging to prevent new bacteria from polluting food. This kind of coconut milk you are talking about is like this. Coconut juice is sterilized at high temperature and then filled under aseptic conditions (or canned first and then sterilized). In this way, as long as the package is watertight, it can be preserved for a long time even without preservatives, because external bacteria can't enter.

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