Patented system of four locking hinges and a resilient silicone seal, ensuring an impeccable 100% airtight and watertight seal Ideal for preserving freshness in the refrigerator, cupboard or freezer Made from durable and safe plastics which are BPA-free Suitable for both microwave reheating and dishwasher usage Capacity: 850ml and External Measurements: 13.7cm x 10.4cm x 12cm