“What is that ?” I asked my housemate. He was doing his online banking, and next to his pad of scribbled finances was a small rectangular box of bright plastic, about the size of a credit card. He opened it up and slid out a few credit cards. “Who needs a wallet?” Who indeed. There’s the fact that most wallets and purses use leather, and our feelings are mixed on that issue. But how about functionality? How many modern money-holders are too big to fit in our pockets – or get too big, because the larger capacity they are, the more they accumulate stuff? Opening my wallet (yes, leather), I find stubs, used train tickets, receipts,

Continued here:
Jimi: The Wallet for Pocket-Sized Pockets