BetterBasics via Amazon offers the Sterline Ultrasonic Cool Mist Aromatherapy Diffuser/Humidifier for $29.99. Coupon code "4CNT3MHI" cuts it to $24.89. Plus, Prime members receive free shipping. It features a color changing LED light, 2-hour, 4-hour, and 6-hour timer settings, auto-shutoff, and a 10-oz. capacity. Deal ends June 12.