A clean, spicy-medicinal aroma. Tea Tree Oil is the natural alternative to harsh chemical-based purifiers. Sourced from the far north coast of New South Wales, Australia, Aura Cacia's tea tree oil is as "green" as can be. The grower focuses on soil nutrition management in order to enhance the tea tree oil production. Essential oil is obtained by steam distillation of the leaves and branch tips. TUB SCRUB: Natural baking soda and essential oils combine to create a simple, gentle tub scrub that has powerful cleansing and disinfecting properties. 1 cup baking soda 24 drops tea tree essential oil 24 drops grapefruit essential oil Thoroughly mix baking soda and essential oils. Rinse tub, sprinkle on powder, and scrub with brush. Rinse.