Double-layer Kettle Design, Anti-scald Insulation Inner Layer of Thickened Stainless Steel 304, Outer Layer of Heat Insulating PP Material Thickened Food-grade Stainless Steel 304, Healthy Water Reject Plastic, Iron, and Fragile Glass Kettle Bodies Odorless, Easy to Clean, Rust-resistant High-quality Temperature Controller 1. 100% Boiling; 2. Dry Burn Protection 3. Over 10,000 Times Boiling Lifespan