My favourite bag at the moment happens to be this clutch from Coast, which I only bought because I had a press voucher that was about to expire. I don't really use bags, especially not the kind that you need to hold on to all the time, but for some reason I like this one. I've filled it up with the following:
Headphones, keys + a whistle that looks like a bird, Templespa lip balm "All Talk", Essie "Mademoiselle", L'Occitaine handcream, Oyster card and some change.