Known to work wonders, essential oils contain the true essence of the plant from which they were derived. Contrary to what you'd think, they are not oily to touch, but rather a pure liquid extracted from the plant. The oils are distilled by using either water or steam and are highly concentrated. Because of this, essential oils are packaged in small bottles as only a few drops are needed at a time. The uses vary from aromatherapy to household cleaning to insect repellent to natural remedies for physical discomfort and well being.