It is made of transparent food-grade PP material, which is safe and non-toxic, and you can clearly see the objects inside the box. You can put it in the microwave and refrigerator, please open the lid to heat. The transparent color allows you to see what is present inside the containers easily. The sealing groove is perfectly matched, the sealing is good, there will be no water leakage, and it is very convenient to take food. The food storage containers measures 6.9''L x 4.9''W x 2.6''H, capacity: 33.8oz, can be used in most refrigerators, freezers, cabinets, drawers. Can be stackable, save your space. Stackable design makes them a good helper for saving space. Welcome your logo! The prices for 900pcs or over are based on ocean shipments.