Kokorest via Amazon offers the Tomshine 400ml Essential Oil Diffuser in Wood design for $29.99. Coupon code " E88XFXWU" cuts it to $15.99. With free shipping, that's $14 off and tied with our mention from a month ago as the lowest price we could find. It features high and low mist settings, four time settings, and seven light colors. Deal ends June 19.