When taken literally, the realm of what someone could be holding onto in their backpocket is actually rather finite. There's only so much room, tools, devices and lucky charms in the world that would fit the bill. But when viewed figuratively, a backpocket is a bottomless reservoir for that which is personal, useful and memorable. Every person has a story in their backpocket, and it's usually one they’re saving for the right occasion. To share your story, email Jake the Brew Guy…