2. [Microwave, Freezer, Dishwasher Safe] These lunch box containers can be heated in the microwave, washed in the dishwasher after opening all compartments, and can also be used as food storage containers in the refrigerator. The lid needs to be removed when heating, and it is recommended to hand wash the lid to avoid any deformation caused by high temperature and high pressure washing. 1. [Safe and High-quality Reusable Materials]: The reusable lunch box is made of high-quality food-grade materials (Plastic). It is safe for your kid's lunch and a perfect meal preparation container for adults. 3. The reusable lunch box set contains everything you need! Easily prepare food, store food, and it is very convenient for children or adults to bring food to school, office, picnics or other outdoor activities.