Feature: 1. The inner layer made of high quality stainless steel material, mirror polished and easy to clean. 2. The outer layer is made of food grade PP material, high temperature resistant, safe and hygienic. 3. The concealed double curved handle is small and portable, convenient for home, work, travel and school. 4. The air-permeable lock valve can remove air, so the food in the box is better sealed and the lid is convenient to open. 5. PP plastic safety lock design, which can be fixed with one click to prevent leakage. Specification: Item Type: Lunch Box Material: Stainless Steel 304+PP Application: students, workers, households, etc. Product Features: 304 stainless steel, hygienic and healthy, tasteless, thickened material, upgraded buckle.