If you're preparing coffee or tea for a crowd -- or, on tougher days, just for yourself -- the Bonavita Electric Variable Temperature Kettle is the way to go. The heater boils a large quantity of water quickly -- at either six preset temperature or a user set temperature from 140° F -- and holds that temperature for up to an hour, while the gooseneck spout makes for a controlled pour. So go ahead, refill that mug.