There’s a lot of information (and misinformation) out there about evaporative coolers and whether or not they work. The short answer: they do, if used correctly and in the right climate.
This is similar, but acts more like an evaporative cooler (not really a traditional air conditioner but it does the job ... of a simple system to work it, and it can reduce the temperature ...
Ideally suited for cooling spaces that are both hot and dry, a swamp ... and they work outdoors, too. Another huge perk is that they don't need to be in or near a window, nor do they require ...