These containers are made from plastic (including BPA-free plastics and Tritan) and from glass.
Many plastic canisters and meal-prep containers are described as stackable or designed to nest neatly, helping save space in the pantry or fridge.
Most options are clear or see-through, offering good visibility of contents; some plastics emphasize crystal-clear or 360° clarity, and glass jars also provide transparent views.
Lids are typically plastic or polypropylene snap/latch styles; some items use glass lids. Many plastic lids include airtight or leak‑proof seals and secure latches (including two‑latch designs). Some glass lids may lack a gasket and therefore may not be fully airtight.