FOLDING HANDLE - Concealed double‑curved handle of bento box adult lunch box is small and portable, suitable for home, office work, travel, and school stadents.<br /> LEAK PROOF BUCKLE - Thermal lunch containers comes with safety lock design, which adopts PP plastic and can be tightly locked by easy pressing to prevent leakage<br /> THERMAL LUNCH BOX - The built‑in sealing rubber ring improves the sealing performance of the lunch box and keeps heat preservation lasting, It can be used for hot food such as soup, fried rice, such as salad, pasta, fruit, etc.<br /> FOOD GRADE ​- The inner layer of insulated bento box for kids/adults using high‑quality food grade stainless steel, mirror‑polished and the outer layer uses food grade plastic, high temperature resistant.<br /> SEALING VALVE - The air‑permeable sealing valve of the thermal food container can eliminate air, so that the food in the lunch box is better sealed, and convenient to open the lid.