Amazon offers Prime members the Crane Ultrasonic Adorable Cool Mist Humidifier
in Penguin, model no. EE-865-FFP, for $21.53
with free shipping
. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $10.20.) That's a buck below last month's mention and the best price we've seen. (It's a current low by $15.) It can humidify a room of 250-square-feet for 24 hours.