tetra pack launch of the industrys first carton made entirely from plant based, renewable packaging materials. the new tetra rex carton will be the first in the market to have biobased lowdensity polyethylene ldpe films and biobased highdensity polyethylene hdpe caps, both derived from sugar cane.toincreasing the renewable content of our packages is not only good for the environment, but also offers our customers a competitive advantage in the overall environmental profile of their products. standard 1 litre tetra rex with twistcap oso 34 can easily transfer to the new version without the need for any additional investment or modification to their existing filling machines. sourcehttpwww.tetrapak.com