Made of stain-resistant glass that won't absorb food odors or flavors, this 16-piece set of glass containers stores, freezes and heats. The lids are designed with locking tabs to provide a leak-proof, airtight seal that keeps food fresh. Integrated into the lid design, the Write + Erase labels let you easily keep track of what's stored inside.Pyrex has been making innovative, durable cookware and food storage for over a century.