25 survival items in an Altoids box, useful for you daypack. I used to make these out of BandAid tins when I was a kid. Now Altoids are about the only way you can get a tin (useful for boiling water in case you are wondering).
I have used tea tree for several of these things. its amazing. The Miracle of Tea Tree Oil: 80 Amazing Uses for Survival. Tea Tree oil has been used for centuries to solve a variety of common woes. Here are 80 uses - can you think of others?
This is an interesting article from Frontier freedom on making lye soap. I have seen recipe for making lye soap but this one is different because before you get to the making soap part they teach you how to make the lye from wood ash.