The storage container set is constructed from PP-5 (Polypropylene-5), a durable, food-grade plastic known for its clarity, stability, and safety. This material is free of BPA, PVC, and lead, making it suitable for long-term food storage. The set includes both rectangular and round containers in multiple sizes, ideal for storing leftovers, soups, snacks, and sauces. Each container features an airtight seal powered by a silicone ring and 4 secure latches, ensuring no leakage even when shaken. Designed for practicality, the containers are safe for microwave, dishwasher, refrigerator, and freezer use—though lids should remain uncovered during microwaving to protect the seal. Their nested stacking design allows compact storage, reducing kitchen clutter. With excellent temperature resistance and reusability, this set supports everyday meal prep and food organization without compromising performance or space efficiency. Color: Clear.