Soy sauce is another product you can easily have on hand because it’s very unlikely to spoil. In fact, it’s one of those foods that don’t expire and can be consumed even after years: thanks to the salt and acidity, they act as natural preservatives. It’s no coincidence that soy sauce packaging has the words “best before” printed on it, and these are usually dates that are well in advance, even up to three years. Furthermore, even after the indicated date, the sauce can still be used without fear of side effects; the only risk is that its flavor may be slightly less intense.