What is the difference between primary and secondary rigid packaging?

Primary packaging is the container that directly holds and comes into contact with the product itself, such as a jar, bottle, or jerry can, while secondary packaging is the outer packaging that groups, protects, or transports one or more primary packages, such as a corrugated carton or shrink-wrapped tray.

Primary packaging carries the most direct functional and regulatory requirements, since it is what actually contains the product and, in many cases, must be compatible with the product’s chemical properties, provide an appropriate barrier against moisture, oxygen, or contamination, and carry the mandatory product labelling required by regulations such as Legal Metrology rules or, for food and pharmaceuticals, FSSAI or drug labelling requirements. A jar of cosmetic cream, a jerry can of agrochemical liquid, and a bottle of liquor are all examples of primary packaging.

Secondary packaging exists to protect and unitise primary packages for handling, storage, and transport rather than to contain the product directly. A corrugated carton holding a dozen jerry cans, a shrink-wrapped tray of bottles for retail display, or a printed outer box for a cosmetic jar are all secondary packaging. Secondary packaging often carries its own labelling, such as shipping information, barcodes for logistics tracking, or additional regulatory declarations required at the outer-carton level, which can differ from what is required on the primary container itself. Understanding this distinction matters when planning labelling, since some regulatory declarations are required on primary packaging specifically, while others may be satisfied at the secondary packaging level depending on the applicable rules.