This food-grade polypropylene latch combined with the silicone seal under the lid provides a leak-proof and odor-proof airtight seal for the lunch box. Can keep food fresh and delicious. It is made of high-quality food contact grade PET material, with good toughness, strong light transmission, toughness, drop resistance and abrasion resistance. The material can effectively resist stains and odors. It is transparent like acrylic, so you can always see the contents, but it is light and easy to carry; the material resistant to pollution and odor makes the plastic food container look like new. It can also be used to store food in the refrigerator without worrying about spoilage. It can also be used as a feast, such as a Thanksgiving dinner or a healthy picnic party. This is an ideal gift for your friends and family.