They sell coffee, tea and the corresponding paraphernalia, including espresso machines and coffee mills. I was just here around lunch time and noticed a line of people waiting for coffee to go. I joined in to find out why. You can get one of two kinds of coffee for 1 Euro 30, as well as tea and hot cocoa. This is served with a chocolate and a tiny muffin. The lady making the coffee was super-cheerful. The coffee was very, very good - about as good as in Rome, I'd say. Definitely a good place to go.