There is more to the Spinifex Whistling Kettle than meets the eye. It's premium blend of materials ensures it will outperform it's rivals and will continue doing so for years to come. Even heating is achieved through sealing a thin layer of pure aluminium between two sheets of high grade stainless steel. This ensures rapid and even boiling without warping. Nickel plated steel also provides an easy to clean surface and to top it all off, it whistles as it boils.