Pure essential oils are very powerful. They need to be stored in airtight containers made of glass.. Diluted oils can be stored in plastic containers, typically PET plastics, which are less expensive than glass containers.
Glass, Metal or Plastic â€“ What should I use with Essential oils and How do I. If you need to use a metal bowl or container the best is high grade Stainless steel.
Essential oils should also be stored in a cool, dark place. Glass amber "Boston round" bottles that essential oils are typically stored in. Other liquids used in aromatherapy (hydrosols, carrier oils, etc.) are also frequently stored in amber bottles.
Stainless steel water bottles are an excellent option if you are worried about. better to be safe and use glass with DIY products, especially if you plan on storing a. (plastics number 1) is also resistant to essential oils and can be used safely.