It depends. Some electronic cigarette packages contain lithium batteries and/or a flammable liquid. The chemical used in the electronic cigarettes may be classified as a hazardous material (Flammable Liquid) and regulated for transportation. Also, the power source for electronic cigarettes is typically lithium batteries, although most frequently the batteries are the button-cell type, which can be shipped unregulated. For assistance in properly evaluating the ability to ship electronic cigarettes, the shipper should contact the UPS Hazardous Material Support Center at 1-800-554-9964.