evaporate water cooler from wool

Does anyone have experience cooling water with evaporation?
I've read about the clay pot stuff, but I'm interested in other stories as well.

My dad & were cleaning out the garage at the farm a number of years ago when I found a Ford car desert water bag.
The canvas bag that you would fill with water and hang in front of the car and allow evaporation to cool it.

He told me a story that when my grandfather was swathing, he would take a gallon glass jug that they had a wool cover for and soak the wool in water and then place the jug in the shade of the first windrow.
He would have cool water to drink as he worked.

My dad told stories of using the desert water bag too on cars. I went to see if there were pictures online and found this fun blog post: http://retiredinaustin.blogspot.com/2012/03/traveling-in-comfort-stories-for-my.html

Check out this stylish evap cooler for 1950s/60s cars!

I am just old enough to remember the bag hung on the radiator.