Thermos brewer that saves electricity As my wife and I get up at different times, I brew the coffee an hour or so before she drinks. Lasts 2 hours only when I brew 4 cups and preheated the thermos jug Shuts off shortly after coffee is finished One thing to keep in mind is that if you brew only a couple of cups, the jug must be preheated with heated water. Easy to use. Aroma selector Timer Descaler Setting for lime content A bit thinly built but user-friendly The coffee will be good