ErligpowhtDirect via Amazon offers two Aromatherapy 120ml Essential Oil Diffusers for $22.99. Coupon code "9LQDPWZH" drops it to $14.99. Plus, Prime members bag free shipping. That's $4 under the lowest price we could find for a similar diffuser. It features LED lighting with seven colors, automatic shutoff, and 120ml tank. Deal ends November 30.