Peter Fredell carries an unusual wallet. It feels a bit like leather, but the material is pale and thin. He pulls it out on a street corner in Stockholm.
"I actually made it myself," he says. "It's an eel that I fished up. And I used the skin and stitched it together."
This eelskin wallet carries personal significance — but it does not carry cash.
Around the world, cash is fading. Electronic transactions are becoming a bigger part of the economy every year.