The 2.5 Quart Stainless Steel Whistling Teapot Kettle with Stay Cool Handle is constructed with high-quality thick stainless steel to retain heat, making your second cup of tea just a good as your first. It has an old fashioned whistle system to let you know when the water is boiling inside, and the handle stays cool for easy pouring. Whistling teakettle alerts when water is boiling recommend you to move after Whistle has been blown.