Returnable Transport Packaging (RTP) or reusable transport packaging is multi-purpose packaging in which goods can be transported more than once between two entities. Single-use packaging, on the other hand, will only be used once.

As soon as a regular freight is identified between two locations, we can speak of a logistics loop or closed loop. For example a central distribution centre and its retail stores or the manufacturer of a car component and the car assembly plant, we can speak of a logistics loop or closed loop.

Closed loop supply chain principles refer to the idea that the supply chain is designed to maintain and recover the value of unused packaging, while maximising efficiency and reducing waste.

Returnable and foldable packaging is ideal for logistics loops as it can be reused several times, and folded when empty to reduce space, thus reducing the number of trucks on the road.