This do it yourself air cooler video has been around for a while so with inflation, $8 is more like $15 by now. But if you have no air conditioning whipping one of these up in less than 30 minutes makes your bedroom much cooler at night and a lot more comfortable for sleeping. It will cool a modest size room for sure. I know several people who have made one and they are really happy with the results. Watch the video, give it a try, especially in your bedroom at night and let me know how it worked for you. Please pass it on to someone else you know that might need it. Thanks,