Ive finally started using more Altoids tins rather than tobacco tins to reduce weight and to try and have more intent towards my kits and carry only what is necessary and nothing else.

I had to cheat here and use a butane torch due to fire bans to discolor the metal
size of tins compared
cut pieces of unbleached calico to match tin size
char cloth
the hack

I don’t remember where I saw this, I believe it was a custom knife maker on youtube who was making custom flint and steel kits. He wrapped the the char cloth in another piece of calico. This prevents the pieces of flint and the steel from breaking apart the char and also stops everything from rattling, making noise. The two extra pieces are also there to make extra char cloth.