When it comes to storing hydrosol, there are a few things to keep in mind. First of all, it's important to keep hydrosol in a cool, dark place. Exposure to light and heat can cause the delicate chemicals in hydrosol to break down, reducing its shelf life. Additionally, hydrosol should be stored in a glass or ceramic container with a tight-fitting lid. This will help to prevent evaporation and preserve the quality of the product. Finally, it's not necessary to refrigerate hydrosol. Room temperature is fine, as long as the hydrosol is kept out of direct sunlight.