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What is Bag-in-box Packaging?

Bag-in-box packaging utilizes a box, bag, and fitment to transport and dispense liquid products both efficiently and without contamination.

  • Bag: The bag is constructed from layers of film that are sealed together and designed to protect the product quality and keep it safe inside from filling through end use.
  • Spout: The foundation of our all bag-in-box fitments, this plastic-framed opening is sealed into the bag when it’s made and is the entry point for filling the product into the bag. After filling, bag spouts are covered by either a simple cap, dispensing tap, or connector and fitment depending on their intended end-use.
  • Fitment: This is a broader category of items including spouts, caps, valves, and more. It encompasses anything that attaches to the bag spout. Bag-in-box fitments can be anything from simple caps that cover a spout, to sophisticated dispensing valves or connecters and hoses that bridge between the spout/valve and outside dispensing equipment.
  • Box: the outer package that holds the capped and filled bag. This can be anything from a simple cardboard box to an industrial-sized steel drum.

The bag is first filled with liquid product, and then a fitment is placed to secure the packaging. The bag is then placed in a box to ensure safety in transportation and dispensing.

Bag-in-box history

Bag-in-box was pioneered and patented by William R. Scholle in 1955, and it was initially used to safely transport battery acid to automotive filling stations and repair shops. While only starting off in the automotive industry, this packaging system quickly spread to other industries. After the aseptic filling process was perfected in 1956, bag-in-box was able to expand into working with food and beverage products. Learn about the roll Scholle IPN played in developing aseptic packaging.