Coffee machines, as found in buy mode. They're under Appliances -> Small Appliances and are a bit expensive. They give a 3 hour moodlet that negates tiredness. That's the base game option. There's also coffee from barista bars and plain, edible coffee beans if you have University Life (gives the same, 3-hour moodlet that base game coffee does), and energy drinks from mixology if you have Late Night.