Jmengel writes -

Make a wallet out of duct tape? How 1992. I remember learning how to make a duct tape wallet at scout camp in 1992, and extended that lesson to a duct tape tie which I wore to any and all high school presentations or performances that required an increased level of attire….

Enter the Innertube Wallet. As a Maker, geek, or otherwise shunned cheapskate, you doubtless have numerous blown bicycle innertubes, a few sheets of rusty 22 gauge steel, and any number of DOA hard disks and their attendant magnets. With such materials and a boundless enthusiasm for turning interminably stored junk into stuff you don’t need, I present the bitchin’ innertube wallet to solve all your wallety needs.

instructables : Bitchin’ Innertube Wallet – Link.