I think one of the Trangia mess tins would be a good containier for a survival kit (I had something very similar as a Scout). I think they are a bit big for pocket carry though; more of a backpack sized kit.

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Victory awaits him who has everything in order — luck, people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck. Roald Amundsen