Cornstarch container with lids with details below: 1. Made from cornstarch ,100% biodegradable, from nature and back to nature. 2. 120℃ oil and 100 ℃ water resistant, can be used in microwave and refrigerator . 3. Healthy, Nontoxic, Harmless and Sanitary ,can be recycled and protect the resource. 4. Variety of sizes and uses available.