Your search for make your own returned 2 results.
Are you out of windshield washer fluid for your vehicle and, like me, you are tired of running to the store to get more? Not only can the process of getting some when you're out be a nuisance, but did you know that you can make some right now without leaving your home using stuff you've already got?
https://www.youtube.com/watch?v=8-QyNVRLLKk Doug teaches you how to build a quick DIY "On Air" studio light using a tap light, some paint, and some tape. It's true the cheapest one I could find online was about $99 but if you check eBay you can find some that are a lot cheaper.