Name: Stainless steel teapotMaterial: 304 food grade stainless steelCapacity value: 2.5L,3L,4L,4.5L,5LWhistle when the water boils:1.Please check the lid is tightened or not? if the lid is not tightened, it will lead to water vapor leakage and will not whistle, so please pay attention to the three small clips on the edge of the lid are all pressed into the kettle2.The water in the kettle is enough or not? if the water is not enough the steam generated can not impact the sounding disc to make the sound too small or silent3. Please check the cover is blocked by food, tea stains, and other fine objectsPrompt:1.only the product itself, not including other.2. Due to different angles, the product image may have a slight color difference, and the product should be based on the actual product.3.Manual measurement, there may be an error of 1-3CM