My family has been making this for years since they immigrated from Vietnam. It's really good and LIGHT, as opposed to the strong flavor of uncut fish sauce. It can also be used as dressings for cabbage salads and any other dishes that needs a light wake-me-up of flavor. You can substitute 'cups' or 'parts'. If you make big batches, you can refrigerate the in a sealed bottle and take it out whenever you need. It stores really well in the refrigerator. I found this sauce is best with egg rolls that are made with pork, but it can be used with any other egg rolls. Please, Enjoy!