Sunvalley Brands via Amazon offers the TaoTronics 2-Liter Cool Mist Ultrasonic Humidifier for $21.99. Coupon code MW7DSFDO cuts that to $9.99. With free shipping for Prime members, that's tied with last week's mention and the lowest price we've seen. (It's a current low by $16.) It features noiseless, 24-hour operation and a 360° mist nozzle. Deal ends August 8.

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