Plastic packaging usually ends up in the landfill, but some previous research that has been done designed a new type of packaging that be reused. Shape memory polymer (SMP) are an elastic polymer that has been altered to give a dynamic shape "memory" properties. It can changes from a rigid polymer to an elastic state which will recover its "memory" shape once it is left unrestrained.
What is happening with the shape memory is that the internal structure of a solid material that can change back and forth between two very different forms, its molecules are rearranging in a completely reversible way. This state is called austenite and martensite where at lower temperatures, they take the martensite form which is relatively easy to shape and soft; and they will transform into austenite, which is a harder material that is much more difficult to deformed at higher temperatures. Previous study said that packages could be sent back to the manufacturer to be reused in an endless loop as this material can be flattened easily and can be returned into the original shape. This also raise the awareness of implementing the Circular Economy principle where a business or an industry moves toward linear consumption towards reuse.
However, there will be necessary to conduct another research regarding the safety in regards to use this shape memory polymer materials.