These containers, typically found at a large retail corporation, are designed for food storage and preservation. They consist of a semi-rigid, synthetic polymer base and a matching top piece designed to create a seal. Examples include sets of nesting bowls in various sizes intended for refrigerating leftovers or packing lunches.
Their widespread adoption reflects several factors. They are lightweight, relatively inexpensive, and reusable, offering a practical alternative to single-use disposable options. This affordability and convenience have made them a common household staple, simplifying meal preparation and storage while offering a degree of organization within refrigerators and pantries. Historically, advancements in plastics manufacturing have driven down production costs, making these items accessible to a broad consumer base.