Essential Oils are highly concentrated and potent oils extracted from plants, leaves, flowers, roots, buds, twigs, rhizomes, heartwood, bark, resin, seeds and fruits. Essential Oils can be extracted from commonly eaten plants such as basil, cardamom, celery, ginger, lime, lemon, orange and others. Several hundred year old techniques such as hydro-distillation technique, steam-distillation technique, solvent and gas extraction technique are used to extract the aromatherapy essential oils from different parts of the plants. Due to federal aviation regulations, all Essential Oils, Extracts, Bitters, Elixirs, Tonics and Syrups cannot be sent USPS priority mail; orders selected to go USPS will automatically be shipped FedEx Ground. These items cannot be shipped to Canada & APO/FPO, Hawaii, Guam, Puerto Rico, Alaska, or PO Box. Please do not select these items for shipment to those areas or they will be omitted from your order (to learn more about shipping flammable liquids, please visit our Shipping Page).