I'm heading to New York and paris this spring / summer and although I don't want to be outed as a tourist straight away, I don't want to carry my usual handbag. I need a rucksack type bag that I can stash a bottle of water, camera, phone, wallet in (traveling with kids so sun hats etc too) but that looks like it belongs in a city. I'm thinking mandarina duck, tumi, fjallraven etc .... Any ideas on what's going to look good?