The Tupperware CrystalWave Plus 4 1/4 Cup Rectangle Containers in green are a set of two medium-sized storage containers with a solid rectangular shape. Made of plastic, these containers feature a Crystalwave Plus and are microwaveable.These original Tupperware containers come with lids and are perfect for storing food items in a convenient and safe manner. Ideal for kitchen organization and storage, these containers are a practical addition to any home.