Newegg offers the Rosewill Electric Aromatherapy Essential Oil Diffuser / Cool Mist Humidifier, model no. RHAD-15001, forfor $39.99. Coupon code "EMCEJEH62" cuts it to $22.99. With free shipping, that's tied with our mention from two weeks ago and the lowest total price we could find by $5. It features a 200ml capacity, color-changing LED light, and continuous/intermittent modes. Deal ends May 9.