Did you know that water not only puts out fires but can also start them? Water can magnify sunlight rays through a process called refraction. When used and focused properly it can create an extremely hot focused beam capable of starting fire! A great outside the box method for starting fire in a SHTF situation when you have no other means. You could be stranded come across a garbage water bottle or even a clear plastic bag, and not realize you now may be able to start a fire with it.
Check out this video we found with 5 interesting ways to start a fire using water