With the Tefal Subito Mini KO5S2D 1L, you can boil exactly as much water as you need. The volume marking shows how much water you're adding, whether it's 1 cup or a full liter. That way, you never boil too much water. Thanks to the double-walled casing, the boiled water stays warm longer. That way, you don't have to boil again right away if you want another cup. The exterior also stays cool, so you won't burn your hands when you touch the kettle. The sturdy metal housing makes this kettle more durable than a plastic model. It lasts a long time, even if you use it every day. Thanks to its small size, the kettle fits easily on your counter. That's useful for smaller households.