Whether it's black tea or green tea, herbal or fruit blends - the perfect tea enjoyment begins with the Zwilling Plus whistling kettle. The Sigma Classic base ensures excellent heat distribution across the entire bottom, and the heat is optimally retained. The tightly sealing lid allows for energy-efficient and low-water boiling. Another quality feature is the outer layer made of magnetic stainless steel, making the Zwilling Plus whistling kettle a versatile choice for all types of stovetops, including induction.