If you have used fresh herbs for the ultimate flavor-fest, you can store my vinaigrette in an airtight container (like a mason jar) in the fridge for up to 5 days. Alternatively, if you've chosen to use dried herbs, you can store your dressing at room temperature. When using dried herbs, the vinaigrette can last for weeks (if you can make it last that long!). Make sure you shake the dressing before each use, as the oil and vinegar can separate over time.