40% OFF on TaoTronics Top Fill Humidifiers Posted on August 29, 2018 by Jeri Update: Deal over. Today only, These two humidifiers are on sale on Amazon at 40% off. TaoTronics 5L Top Fill Humidifiers Ultrasonic Cool Mist Essential Oil Diffuser Humidifier, 3 Mist Levels: $36.47 TaoTronics 2L Top Fill Humidifiers, Ultrasonic Cool Mist Essential Oil Diffuser Humidifier: $42.74 Share the love: