Honeywell - Ultrasonic Easy to Care 1-Gal. Cool Mist Humidifier - White for $59.99
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This Honeywell HUT-220W humidifier features a 1-gal. reservoir capacity that provides up to 24 hours of moisture output per filling and a top-fill design for easy refilling.
Product Features:

• 320 sq. ft. coverage
• 1-gal. capacity 
•  Variable moisture output settings 
•  Top-fill design 
•  Filter-freedesign 
•  Dishwasher-safe top 
•  Flowing water 
•  Quiet operation