DUOBI is a multifunctional Food Kettle designed to meet the needs of students and professionals alike, making boiling or steaming food as simple as boiling water. It innovates beyond traditional kettles by detaching the heating element, making the container dishwasher safe, and enabling easy disassembly with just a screwdriver for recycling. With an intuitive handle mechanism, DUOBI switches from boiling to steaming by lifting the handle, while the built-in strainer allows effortless pouring. Marked levels guide users for each function, and the tapered top improves readability of the digital temperature display for precise control. Durable materials, minimal machining, and self-assembly methods extend its lifespan, addressing the short 1–2 year cycle of mass-produced kettles. Designed for cradle-to-cradle sustainability, DUOBI reduces electronic waste while staying cost-effective and user-friendly. Integration with the DUOBI App enhances the cooking experience, offering AI-generated recipes, ingredient-based suggestions, and community sharing, creating a holistic product-service ecosystem.