Durable and Made in France, you can store, freeze and reheat them indefinitely; they're dishwasher and microwave safe Leak-proof and 100% airtight seal prevent messes while keeping food fresh, featuring a convenient and durable screw-on lid. Set of 6 x 4oz + 6 x 6oz + 12 x 8.5oz containers and lids, with measurement markings for the perfect portion