This whimsical Halloween Bats Aromatherapy Pendant includes 8 inserts of different colors, ready for you to add one or two drops of your favorite essential oil or oil blend. For example, many publications and research documents indicate that lavender and clary sage are calming essential oils, while a citrus blend is uplifting and invigorating. There are many essential oils and blends that can help with various emotional feelings such as anger, anxiety, etc. A great mix for Fall is a drop of patchouli essential oil and a drop of cedarwood essential oil. Your own research can help with essential oils, but you are welcome to contact me for oil information and availability. Oils not included. Insert colors may vary from those shown above. Chain design may vary from photo.