It’s important to dilute your essential oils in a carrier oil before applying them to your body. Using undiluted essential oils on your skin can cause redness and irritation. Pour your body oil into a dark, semi-opaque glass jar with a lid. Since sunlight breaks down oil over time, it’s important to store your body oil in a cool, dark place, like your bathroom cabinet. [15] X Research source Typically, body oils will stay good for about 1 year. If your body oil smells off or changes in texture, throw it away.