Attribute Value QUALITY: lunch box is made of stainless steel and food grade PP material, BPA-free, healthy and durable. We use thicker materials that are not easy to break. The top and bottom are very strong. 100% LEAK-PROOF: Out Side & In Side Leak Proof. The lid fits tightly to the stainless steel food tray, so food does not run from one compartment to another, preventing food from mixing. With a 100% leak-proof, you can store liquids such as sauces or yogurt in it. DISHWASHER/ FREEZER SAFE: This Stainless Steel tray is removable, can be cleaned up easily in the dishwasher. The plastic bottom box is freezer safe, BPA free, another useful function is you can pour in some hot water before you eat to heat the food. Microwave Safe (Without Lid): Reheat your food easily and enjoy warm meals anytime. ALL FOOD IN ONE CONTAINER: 3 compartments can fully accommodate the nutritional needs for children's school lunch, you can put cut-up sandwiches, soup, pasta, noodle, green salad, wraps, chips, nuts, dried fruit, and fruit and so on.