Don't get hung up on the type of container. The main objective is that you have the important items within reach when it hits the fan. I have carried compass, matches, F A kit in all kings of ways over the years. Items carried in soft containers like cloth bags tend to abrade against the other items thrown into a backpack. That is the advantage of a small rigid metal container like an Altoids tin, especially for items you want to carry with you and that you will be checking only at infrequent intervals. Be particularly sure that your matches and firestarters are well protected. But almost anything will serve, especially for a short period of time. Consider aluminum soap dishes, bicycle tire patch kits, or small tins used for cocoa powder.