Material: Stainless steel Notice: Try not to let water over the water line to aviod water overflow.If above, it won't whistle. Please remove water and completely dry interior after use to avoid water scale formed. If water scale is formed, don't worry, here is the way to remove it: Boil water on medium heat. Put 1 oz of food grade citric acid detergent in about 5-10 min Wipe the scale with a rag,rinse and dry. Do not let the flame over the bottom. Open small or medium fire to protect the spout and the handle from being burned. Do not fill your kettle with water less than 0.6 quart to avoid boiling dry. Package Contents:1* Stainless Steel pot Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.