I built my own kit, and I got a lot of enjoyment out of doing it.<br>It did take some research and planning. It also cost me more than I planned on because I had to purchase some things in large quanitys such as the water purifications repacking bottles listed on this site. But I have a much better understanding of what's in the kit and how to use it. And because I built it myself its not a big deal when the time comes to replace the expired items.