Amazon offers Prime members the Crane Adorable Ultrasonic Cool Mist Humidifier in Panda, model no. EE-3189, or Owl, model no. HS-1932,for $19.80 with free shipping. (Non-members can spend $49 to bag free shipping; otherwise, it adds $8.82.) That's $7 under our April mention of a different style and the lowest total price we've seen. (It's a current low by $16.) It features a run time of up to 24 hours, auto-off function, and 1-gallon tank.