Ipeth Storage Lunch Box is made of food-grade PP plastic material, freezable and microwaveable after removing the lid. There are small and large sizes to choose from. Designed with a transparent box lid for easy visibility. The lunch box can be stacked for storage and the bottom is non-slip. Embedded soft rubber sealing ring design to prevent dripping and leakage. To prevent staining, it is not recommended to store dark colored food or strongly corrosive food. Perfect for daily work, college, picnics, or food storage at home. Imprint lunch box only can be hand washed.