1. Material Our lunch box is made of 304 stainless steel, BPA , corrosion resistant, not easy to damage or deform, and designed for long time use. In addition, the lunch box has smooth edges and a 3 layer lock to keep food and reusable. 2. 3 different sizes With a metal lunch box of 660 ml, 1040 ml and 1590 ml in 3 different sizes, the stainless steel containers with lid are for storing a variety of food, fruit or snacks. You will receive 3 stainless steel airtight containers in different sizes in sufficient quantity to meet your daily needs. 3. LEAK PROOF Each stainless steel tin with lid features a precisely fitting lid with integrated silicone seals that prevent leakage. for soups, sauces and wet snacks without worrying about spills in your bag. Ideal for use as a snack box or lunch box. 4. Easy to clean This stainless steel lunch box can be washed by hand or in the dishwasher and the smooth inside can be easily rinsed out. Stainless steel containers are resistant to and low temperatures and have a stable body. The leak proof stainless steel lunch box can be used in the oven, dishwasher, fridge, etc.