A container is an object or structure designed to hold, protect or transport other things. At the simplest level it provides a boundary between its contents and the surrounding environment, making handling, storage and movement more practical. Containers range from small personal items such as jars and boxes to large industrial units used in shipping and storage.

Common types and characteristics

Containers are commonly distinguished by size, material and purpose. Typical categories include:

  • Packaging containers — bottles, cans, cartons and jars for retail goods.
  • Storage containers — bins, tanks and drums used in warehouses or facilities.
  • Transport containers — pallets and intermodal shipping containers that facilitate movement between modes of transport.
  • Specialized containers — scientific sample vials, cryogenic dewars, or hazardous-material tanks.

Materials are chosen for strength, impermeability, weight and cost: common options include cardboard, glass, plastics, metals and composite materials. Effective containers balance protection, ease of handling and environmental considerations such as recyclability.

History and development

Humans have used containers since prehistoric times, with pottery and woven baskets among the earliest examples. Over centuries, innovations in materials and manufacturing—metalworking, glassblowing, plastics—expanded forms and functions. In the 20th century, the standardization of intermodal shipping containers revolutionized global trade and logistics; this process is often called containerization.

Modern uses and notable distinctions

Containers are central to retail, industry, laboratory work and transport. A recent and important extension of the term appears in computing: software containers package code and dependencies so applications run consistently across environments. While physical containers enclose material goods, software containers encapsulate processes and files to improve portability and isolation.

Key distinctions to remember: packaging containers are optimized for presentation and consumer handling, storage containers for capacity and preservation, and transport containers for standardization and intermodal compatibility. Choosing the right container involves assessing the contents, required protection, regulatory constraints and environmental impact.