It is a great way to use the essential oils of your preference. Drop some your essential oils on the cotton balls, wait a few minutes for the oil to be absorbed, this small aromatherapy necklace can hold the aroma of oil for a whole day. Perfect Gift - A beautiful set of classical aromatherapy Pendant gifts, it's a great choice as a gift for your lovely family and good friends on Birthdays, Christmas, Holidays, Graduations, or any gift giving occasion.