This is a set of 22 food storage containers with lids, ranging in size from small to large. The set also includes 24 reusable labels and a white marker pen as a free gift. The product features a silicone sealing ring for 100% leak-proof and airtight performance. The lids are reinforced to prevent breakage. The containers are made from durable TPE+PP (polypropylene) materials that are food-grade safe and free from Bisphenol A. This ensures the food storage containers have a longer lifespan even under harsh conditions. Through testing, the containers are proven safe for use in microwaves, refrigerators, and dishwashers. They are perfect for meal prepping and carrying food on the go.