How long can you keep soy sauce in the plastic package that you get from the Chinese restaurant?

Soy sauce can be kept in the plastic package from a Chinese restaurant for about 1 to 2 weeks when stored in the refrigerator after opening. If left at room temperature, it's best to use it within a day or two. For longer storage, consider transferring it to a sealed container and refrigerating it, which can extend its shelf life for several months. Always check for changes in color, flavor, or odor before using.