Designer Oyster card holders from Oxfam

For anyone living in London, the Oyster Card is already an essential item if you don't want to pay through the nose for public transport. But the cards have just been given a stylish makeover for Oxfam by a host of top design houses including Katherine Hamnett, Gharani Strok and Frostfrench.

The funky wallets (which can, of course, be used to carry any credit card sized item) are available via Oxfam's Ebay Shop at £4.99, or at Oxfam's Notting Hill and Westbourne Grove stores in London. All proceeds go to Oxfam's I'm in campaign, the charity's movement to fight the injustice of poverty worldwide. You can also sign up to the campaign at Oxfam's website, and receive a free wallet. I'll bet these limited edition designs will become hot property soon, so get in quick!