Material and Use: Our bento box is made of high quality plastic material. And this product is usd as snack & meal storage container bento box. HIGHLY LEAK PROOF: Upgraded slicone sealing belt is with more durable quality and wide size to connect 2 layer bento box lid with the top contianer. And the buckles also can help it set tightly without spill in the bento lunch box bag. So you can take this cute bento box with bag out and about freely Healthy & DURABLE: All our adult bento lunch box parts are made of health-safe & eco-friendly material to insist on the healthy and Environmental friendly idea. So throw away the disposable lunch contianer and built healthy and green life style with this cute bento box MICROWAVE & DISHWASHER SAFE: Microwave Safe bento box(without lids, 248, within 3 mins ); Freezer Safe(-4); Dishwasher Safe( Had better wash the bento boxes lids by hand). So easy to take meal for work and school, just confidently pack whatever food you love and no time-wasting in cleaning THOUGHFUL PORTION SIZE: These lunch boxes are valuable because they have a lot of room of food, total 1700ml . 2 Layer with 3 comparments portion can accommadate with the appetite of most people, even the adult man. Whats more, the customizable divider can help you make the good portion control in your daily lunch meal. So dont hesitate to choose this perfect size large Japanese bento box for adults & kids