The Primula PTKG-4420 2 Quart Glass Whistling Tea Kettle is classically designed and simple to use. Made of hand blown borosilicate glass which has been proven to be stronger and more heat-resistant than traditional glassware, it rapidly heats your water to a boil. The bright green lid and handle are made with heat tolerant phenolic plastic to keep your hands cool when pouring. The lid sits securely atop the glass mouth with angled spout, and has an easy push lever for opening and closing. You'll love watching the bubbles rise in this transparent crystal-clear tea kettle as it heats directly from your stovetop. A pleasant sounding whistle is emitted when the water reaches bowling point.