Housmile via Amazon offers its Housmile 300ml Ultrasonic Aroma Cool Mist Humidifier / Essential Oil Diffuser for $32.99. Coupon code "KTSITFGR" cuts it to $15.99. With free shipping, that's $17 off and the lowest price we could find. It features an auto-shutoff, color-changing LED light, and four smart timer settings. Deal ends February 28.