SAFE MATERIALS: Our 3 Liter tea kettle is made of surgical grade stainless steel, which can withstand rust, corrosion and dents. The WOOD GRAIN handle can protect your hands from hot water and steam. ENCAPSULATED BASE: With an IRON layer between 2 ALUMINUM layers wrapped inside of surgical stainless steel, our tea kettle aims at quick heating and compatibility with all stovetops. GENTLE WHISTLING ALARM?Relax and enjoy your time, the whistling sound from the kettle will notify you when the water is boiled EASY TO USE AND CLEAN: Just fill the kettle with cold water and place it on a cooktop turner. Wait until the kettle whistles. The MIRROR FINISH is easy to stay clean and shiny. Hand wash only. DO NOT use dishwasher. SALES SERVICE: If there are any problems during usage, please contact us as soon as possible. Our service team provides premium service to help solve any problem.