Canned soy milk may last as long as eight months before it's opened, but once you open it, you must refrigerate it, where it will last about 10 more days. More commonly, you'll have a carton of ...

But if you have a carton of soy milk in your fridge, you might be wondering exactly how long you have to finish an open container of the stuff before it starts to go bad. Soy milk that has been ...