Stella McCartney has teamed up with shopping charity Buy Once Give Twice. McCartney has donated A Whatever It Takes Book Tote featuring artwork that represents a 'Symbol of Hope' with her signature on the bag. This bag is exclusive in the UK to BuyOnceGiveTwice and comes with a letter of authenticity. BuyOnceGiveTwice is a network through which people can buy lovely things and benefit charity at the same time. It's a win-win situation. Charities and bona fide good causes can auction lots on the site that you can upload yourself. Charity supporters (individual people or companies) can auction items through the company - it's a great way of donating to charity without actually writing a cheque. Buyers can bag themselves items which range from the everyday to the once-in-a-lifetime experiences. And it feels good to be giving, by buying.