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 ON-THE-GO SNACKS!: These containers are the perfect food container for storing and transporting main courses, leftovers, cookies, brownies and more SILICONE SEAL WITH LOCKING LID: It is designed with a silicone seal and locking clip creating a perfect leak-proof seal, making for safe storage and transportation on-the-go THIS SET INCLUDES: Five 1-cup containers, Five 2-cup containers, Two 4-cup containers, One 8-cup container and One 12-cup container, all with lids Also included are: four 2 tablespoon dressing containers and lids 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)