Lock & Lock HPL343S16 16-Piece Polypropylene Food-Storage Container Set Food-storage containers in 2-2/7-, 3-2/7-, 4-1/5-, 5-, 7-3/5-, 10-, 12-3/5-, and 18-3/5-cup sizes Durable polypropylene construction; clear bases allow for better visibility of inside contents Lids with 4-hinge locking system create air- and water-tight seal Containers stack and nest to ensure space-saving storage in cupboards and drawers Safe to use in refrigerator, freezer, microwave, and dishwasher