The Pure-Pak® Imagine carton No need to imagine the most sustainable carton – it’s here! Pure-Pak® Imagine is our most environmentally friendly carton to date. It is a modern version of our original Pure-Pak® carton – designed with an easy open feature. The natural solution to the global need to reduce the usage of plastic bottles The Pure-Pak® Imagine carton has no plastic screw cap and is 100% forest based made with Natural Brown Board. The carton is fully renewable and carbon neutral, creating the perfect low carbon, circular economy approach.