Housmile via Amazon offers its Housmile 300ml Wood-Grain Essential Oil Diffuser / Cool Mist Humidifier in Black/Brown for $18.99. Coupon code "BOYPTVLQ" cuts that to $14.99. Plus, Prime members bag free shipping. That's $4 off and the lowest price we could find. It features seven LED colors and four timer settings. Deal ends February 28.