LEAK-PROOF FOOD STORAGE: The SnapLock Collection by Progressive consists of stack-able, leak-proof containers that are great for home, office or on-the-go! GREAT FOR BENTO LUCNH KITS: These containers are the perfect food container for storing and transporting lunch kits with the main container is great for salads, pasta, etc.. and includes a top tray with 3 sections for snacks, toppings and much more SILICONE SEAL WITH LOCKING LID: It is designed with a silicone seal and locking clip that creates a perfect leak-proof seal, making for safe storage and transportation on-the-go 4-CUP CAPACITY AND SPACE SAVING DESIGN: The Unique design allows the containers to be stacked so the can save space in the pantry, refrigerator and freezer and has a 4-CUP Capacity DISHWASHER SAFE AND BPA FREE: It is made from polypropylene and silicone and is BPA and Phthalate Free, Dishwasher Safe, Freezer Safe and Microwave Safe (clips must be unfastened before Microwaving)