Anjou Naturals via Amazon offers its Anjou 200ml Essential Oil Aromatherapy Diffuser for $16.99. Coupon code "63WC64WN" drops it to $11.99. Plus, Amazon Prime members bag free shipping. That's $5 off list and the lowest price we could find. It features automatic shut-off, four timer settings, and seven LED lighting options. Deal ends November 18.