I have the older version of the cube fan that Eric linked. I've had it for YEARS. Two D-Cell batteries and those last for about a year. I don't think it's made anymore. Dang planned obsolescence.
Works great for moving air around.
We use one of those too. Very effective at moving air about, and keeping the temps even throughout.
2017 Escape 5.0 TA (someday soon, I hope )
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln