Our “Concentrate 6” assorted aromatherapy inhalers include 2 each of "Alert", "Focus" and "Uplifting" inhalers made with 100% pure, therapeutic grade essential oils. This pack is great for studying, work, school or any other activity that demands your best. Our inhalers are made in the USA with high density medical grade plastic to keep the oils from evaporating or oxidizing. The most effective method for deriving the benefits of essential oils has been proven to be inhalation.