Something Dad showed me a few years back, it's a good and pretty waterproof way to have a small fire without having to gather wood.
Take a tuna can, or something about that size(extra points if you used one of the openers that lets you use the lid). Cleaned out, of course. Cut some strips of cardboard wide enough that a piece inside will let the lid sit in place, and coil them up so you have a can full of cardboard. Then melt some wax and pour it in; let it sit a minute or two so the cardboard can soak it up, then pour out any excess and let cool. When lit the cardboard acts as a wick for burning the wax.
It does take a flame to ignite it, no flint & steel here, but it gives a hot fire in a small area
Besides covering it up for transport, and smothering the fire, you can use the lid to control the size of the burning area
Remember, both the can and the lid will get hot, so for use it needs to be on a much better surface than what I used here(JUST long enough to take the pictures).
Update: A good tip from comments:
I learned to keep it warm and get as much wax as possible in it before allowing it to cool from Gerry. You could use the oven on warm to keep it liquid until the cardboard is saturated.
And something I remembered: you can either make a couple of the pieces a bit wider than the others or stick some small pieces in between coils; a bit that sticks up above the rest makes it easier to light.