Kindly Note: Our lunch boxes cover using leak-proof anastomosis rubber seals, which can firmly lock in food and prevent leakage. It is normal when it is difficult to open for the first time. Once the food is loaded, with the weight of the food, the tray of our lunch box will not stick tightly to the lid, which is very friendly to use with preschool children BPA-FREE MATERIAL: Our lunch boxes are made of food-grade 304 stainless steel material, which will not bring any smell or other negative influence to your food; In addition, we also use high-strength plastic to produce the external structure, making this bento box not only solid but also easy to storage LEAK-PROOF TECHNOLOGY: Designed with 4 kid-friendly latches that are easy for kids to open and close; And leak-proof cover using anastomosis rubber seals, which can firmly lock in food and prevent leakage; Keeps meals and snacks fresh and mess-free during transport; Kindly Note: After the lunch box is filled with food, the tray will not stick tightly to the lid REMOVABLE STAINLESS STEEL TRAY: The stainless steel liner of this insulated lunch box is detachable and can be washed in the dishwasher for easy cleaning; Besides, it has 3 compartments to separate food, prevent food from mixing together, and separate vegetables, fruits and snacks to maintain the original taste of food HOT LUNCH CONTAINER: This kids lunch box has a removable liner, you can pour boiling water on the plastic layer and then cover it with a stainless steel layer to keep the food warm KIDS FAVORITE CARTOON UNICORN PRINT: Cute cartoon unicorn design, adding more interest for kids, which make your child love to take it out and let your children enjoy lunch happily; Great gift for kids who back to school or school office supplies; 800ml/27oz large capacity is practical for daily use; Size for ages 3-7