Food grade PP is safe to use and does not contain The detachable sealing silicone is designed to keep warm and for, not easy to leak and This meal preparation container can be used in a microwave, dishwasher and refrigerator Please do not use a microwave to heat this box for more than 3 minutes The top and inner lids and cutlery sets are not suitable for microwave ovens It is very suitable for storing fruits, vegetables, sushi, biscuits, candies, noodles, sandwiches The practical box is suitable for adults, children, men, women, teenagers and students, and can be used in any place such as work, school, picnic, camping 4 lunch boxes of different sizes can hold different amounts of food You can easily put this box into your bag, which is to carry