I always have a small bison capsule on my keyring with a folded and rolled up $20.00 (VERY tightly rolled up) laugh and a small piece of paper with important family and friends phone numbers, the "800" number and account numbers for a pre-paid calling card with 400 non-expiring minutes on it, and a spare key to my car.

I call it my urban (cash and call for help/or at least drive home) capsule, in case I should lose/be robbed of everything but what's in my pocket.

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In omnia paratus