DURABLE: Tough storage containers feature unique 4-hinge locking system durability tested for long-lasting performance up to 3 million usesNO MESS, STAYS FRESH: Enhanced locking system is 100 percent airtight to keep foods fresh longer and 100 percent leakproof to prevent unwanted drips and spillsBPA-FREE CONTAINERS: Peace of mind for healthy, happy food storage and containers also work great for organizing items in the office, closet, or garageVERSATILE: Microwave safe and dishwasher safe for a convenient, all-in-one storage solution in the re