Essential oils come in a 1/2 oz. amber bottle with the glass dropper included, but not inside the bottle, for easy measuring or application. Essential oils are extremely concentrated and are not meant to be used straight or neat, but instead are to be mixed with vegetable oils for massage, alcohol for perfume or liniments, water for steams or scenting a room on flowers as in potpourri. The inhalation of their vapors is usually enough to act upon the mind or body. Caution should be exercised in their use.