【High-quality 304 stainless steel liner】: The liner of this lunch box is made of high-quality 304 stainless steel and is highly mirror-polished, which not only improves durability and corrosion resistance, but also makes cleaning extremely convenient. This material and processing technology ensure the hygiene and easy cleaning of the lunch box. 【Silicone sealing ring】: The inside of the lunch box is equipped with a thickened and widened silicone sealing ring, which is connected to the plastic as a whole. This design not only makes the sealing ring not easy to fall off, but also greatly improves the sealing and heat preservation effect of the lunch box, ensuring the freshness of the food. 【Smart exhaust hole】: Drawing on the principle of the pressure cooker, the lunch box is designed with a press exhaust hole, which can easily seal the box body when used. Open the top exhaust hole before opening the lid. This design makes it easy to take out and wash the lunch box after use, avoiding the inconvenience caused by too tight sealing. 【Safety buckle】: There are safety buckles on both sides of the lunch box, which can be easily buckled by pressing to ensure that the lunch box will not loosen during carrying. The short buckle design makes the lid fit tightly with the box body, providing additional safety protection to prevent food from spilling during transportation. 【Ergonomic handle】: The lunch box is equipped with an ergonomically designed arched handle, making it more comfortable and convenient to carry. The handle can be pressed into the bag when not in use. The design is beautiful and does not take up extra space, reflecting the careful consideration of the user experience.