A little goes a long way; I usually combine 1/4 cup of the fish sauce, vinegar, and sugar with 1/2 cup of the water, and it makes plenty for a large family dinner or to save. This will keep in the refrigerator for a very long time.
1 part fish sauce
1 part vinegar
1 part sugar
2 parts water
chili paste to taste
1. Combine the fish sauce, vinegar, and water in a large bowl.
2. Add the sugar. Stir until dissolved. Test and adjust flavors if needed.
3. Add chili paste to taste.