Amazon offers the Optimus U-31002 Cool Mist Ultrasonic Humidifier w/ Output of 1.5 gallons in 18 hours for a low $25.85 plus FREE shipping on orders above $49 or with Amazon Prime.

What makes this deal hot:
You save 77% off the price! That's the lowest price we could find. This has a 4.1 out of 5 star rating with 204 customer reviews on Amazon. User reviews have commented on that it is extremely quiet and doesn't disturb you.

• Features 1.11 gallon tank capacity and can outputs 1.5 gallons in 18 hours
• Adjustable mist volume control that allows you to set to your comfort
• Removable transparent tank with handle for easy removal
• Light turns on inside the unit and the motor stops working when out of water
• Whisper-quiet operations so it won't disturb sleep