Tea Tree Essential Oil is one of the Aroma 10 ml blends. Some users find the scent to have antidepressant properties. The container provides just the right amount of oil you require in an easy-to-use roll-on bottle. All of these products are 100% pure essential oils blended with Almond oil. None of them contain artificial preservatives, parabens, dyes, emulsifiers. Other oils are available through ODIN BOOKS.