Home Depot offers the MistyMate Twist & Mist Single Nozzle Flexible Mister, model no. 14000, for $6.48. Choose in-store pickup to dodge the $5.99 shipping fee. That's the lowest total price we could find by $8, outside the mention below. It extends to 36" and purportedly cools air by as much as 30°.

A close price: Walmart charges $7.04 with free in-store pickup.