- The Whisper Boil function on this Dualit kettle won't wake up the whole house when you make your morning cuppa - Its 1.7-litre capacity gives you enough hot water for 6 cups - great if you've got friends or family over - The removable filter keeps limescale out of your drinks, so your tea and coffee taste better - With the 360° base it is easy to use the kettle whether you're left or right-handed - Its two water windows mean you can measure the water by cups or litres