A key fob and a handy little purse in one - with a dancing penguin in a tutu on it.  It's everything you need when you leave the house.  Pop the house key on the keyring and your credit card in the purse (it's designed to be exactlly the right size) and you are good to go.

The purse is ideal for holding all sorts of things as well as or instead of credit cards such as small change, lipstick, the headphones for your mobile or a hundred other things. It's soft and flexible, so that it's not bulky in your pocket but large enough to make it easy to find, even in a full handbag.