Sweet! If you need a new humidifier, head over to Walmart! Right now you can get the Mainstays Ultrasonic Cool Mist Humidifier for only $14.88! (Reg. $50) This humidifier has a 1.5 gallon reservoir. It will run for up to 16 hours of operation from 1 tank. Plus, choose in-store pickup to save on shipping. Or, shipping is FREE when you spend $35 or more.