Riess Whistling Kettle 'Classic Plus' with Whistle, 2 l, red, enamel. When the kettle starts to whistle, it's usually time for a cup of tea. The whistling sound begins as soon as the water boils. The hygienic and heat-conducting properties of enamel, combined with the shape, make it perfect for healthy, quick, energy-saving, and safe water boiling. To make the kettle particularly durable and resistant, it features an additional inner enamel coating in dark blue. The kettle is suitable for all types of stoves. Capacity: 2 l, max. fill volume: 1.8 l.