Yup. Dryer lint.
If you are not aware – dryer lint is an excellent tinder to start fires. Most all households have dryers with lint screens. People every day clean off the lint screen and throw away the lint. Weeks ago I started collecting the lint and use it frequently to start my fire pit.
So – the assignment: Start saving your lint. Stuff it in a Ziploc bag and pack it away for when it may be needed.