Whistling teakettle alerts when water is boiling, the whistles are built right into the lid. Flip-up spout cover for safe and easy pouring and a stay cool trigger for safety. Easy to hold and grasp and makes serving safe and easy due to its Nylon Handle. Tea kettle is made of durable, food grade stainless steel. Easy to fill the top comes open wide so it's really easy to fill with spring water.