Lock&Lock's food containers from the BasicLine series are perfect for storing fresh and frozen foods, from cut-up fruits and vegetables to leftovers or dinners. They are also great for keeping pasta, rice, flour, sugar, crackers, cookies, and other cupboard or pantry items fresh for longer, securely stored, and organized. The versatile storage containers can be used to transport lunches to and from work or school, or even for storing smaller kitchen, office, or craft items. Lock&Lock's BasicLine series offers a wide range of shapes and sizes, each with a securely locking lid for airtight storage. Also, the clear body of the containers makes identifying contents easy, no labels required. Airtight Containers with Four-Sided Locking System Lock&Lock's BasicLinec series features an innovative four-sided locking system for an airtight seal and watertight storage so food stays fresh longer with no leaks or spills to worry about. The four sides of the locking system promote an airtight seal due to equal pressure to all four sides, along with the hollow-center silicon sealing ring that makes it possible to lock tightly. Made of high-quality BPA-free plastic, Lock&Lock's BasicLinec food-storage containers not only offer an airtight and watertight seal, but they're also very durable. The containers can withstand temperatures ranging from -4 degrees F to 210 degrees F (-20° C to +120° C), making them suitable for use in the freezer, reheating food in the microwave, and can be cleaned in the dishwasher. The base and lid should not be used in the oven, or under grill elements.