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How to put together a pocket survival kit
Get a container.
Most people use an altoids mints tin to put their kit in. If you can't get altoids, marks and spencers do a brand called curiously strong mints, which have a similar sized tin.
If you want something bigger, places like b&q make plastic containers (intended for keeping stuff like screws in) that are suitable. Any container that you get should clip shut, so that it doesn't spring open.