The project focuses on the development of "Xanh," an innovative device designed to prepare fresh Matcha and plant-based milk simultaneously. The name "Xanh," meaning "green" in Vietnamese, reflects the product's commitment to natural ingredients and sustainability. Utilizing the Double Diamond design model, the project systematically explored, defined, and addressed the challenges of oxidation in Matcha and the demand for a convenient, aesthetically pleasing solution. The result is a compact, user-friendly appliance that blends functionality with elegance, offering a seamless experience for health-conscious consumers. "Xanh" embodies the perfect fusion of tradition and modern convenience.