Anna Tingley If you purchase an independently reviewed product or service through a link on our website, Variety may receive an affiliate commission. As brutal heat waves ripple through the country — with more than 50 million people in the U.S alone suffering triple-digit temperatures this week — it’s never been more important to be outfitted with devices that can keep you cool. While air conditioning units and standing fans are a must in a heat wave, another handy, portable and more affordable device has taken over the streets over the past month: handheld fans.