MATERIAL: Storage containers are made of PP+PE materials, resistant to high and low temperatures, and can be used in refrigerators and microwave ovens. STACKABLE DESIGN: layered storage, free stacking layers, saving space. The bottom is non-slip design, not easy to slip off, and it is stable. FUNCTION AND USE: Suitable for storing dumplings, seafood and meat. Seal it with a lid to keep it fresh and prevent odors. It has good airtightness and does not leak water. SIZE: The size of the crisper is 9.6 x 7.3 x 1.37 inches. The perfect size for most refrigerators, freezers, cabinets and drawers. TEMPERATURE RANGE: The temperature range that the crisper can withstand is 100C to -20C (Reminder: please remove the lid when heating)