I second charcloth and natural twine. This is what I use with flint and steel. I keep an Altoids sours tin with my flint, steel, char cloth with jute twine wound up around the inside. The twine makes really compact tinder until you fluff it up to use it. It also seems to catch fire at a lower temperature then cotton balls.
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A gentleman should always be able to break his fast in the manner of a gentleman where so ever he may find himself.--Good Omens