There are many ways to apply and use essential oils including topical, inhalation, compresses, baths, diffusion and in DIY home cleaning solutions. (http://www.abundanthealth4u.com/Essential_Oil_Application_s/38.htm)
Aromatherapy necklace diffusers are a wonderful way to enjoy the benefits of essential oils as your body heat releases the oils. Although there are many companies that are producing the necklaces now, I have found that Sacred Arrow Jewelry is producing a beautiful product using stainless steel necklaces with a leather pad insert from leather that has been treated in a non-toxic way. Please take a moment to watch their video.