Part 2. Storing Oils In a Stable Environment. Keep stored oils out of direct sunlight. Store oils in a refrigerator. Avoid heat sources. Keep the cap tightly closed on the bottle. Consider investing in an aromatherapy storage box. Avoid storing oils on easily-damaged surfaces.
Diluted oils can be stored in plastic containers, typically PET plastics, which are less expensive than glass containers. Diluted essential oil mixtures should also be kept out of direct sunlight and stored in a cool, dry place.
The way you store essential oils affects their therapeutic healing powers. Get it wrong and they will spoil quickly. Get it right, and they will keep for twice as long .
To avoid deterioration and protect the aromatic and therapeutic properties of your essential oils, store them in amber or cobalt blue bottles. Dark glass such as amber or cobalt helps to keep out deteriorating sunlight. It is best not to store essential oils in clear glass bottles.