Finland-based dairy producer Valio will now offer its Luomu organic milk and sour milk in Tetra Pak's carton packaging made entirely from plant-based materials after a trial period of three months.
Valio tested Tetra Rex bio-based cartons with its Eila lactose-free, semi-skimmed milk drinks from January to March.
Valio Packaging Technology manager Tanja Virtanen-Leppä said: "We received extremely positive feedback from consumers during the test phase, so it was natural to move towards a more permanent use of fully renewable milk cartons.
"We have chosen to use the 100% renewable packages for our organic milk in the first instance because buyers of organic products in particular appreciate ecological packages."
Tetra Rex bio-based cartons, which are made from a combination of plastics derived from plants and paperboard, feature low-density polyethylene to create the laminate film for the packaging material. The neck of the opening, together with the high-density polyethylene used for the cap, is derived from sugarcane.
Valio aims to increase the amount of renewable material used in its packaging across its full product range.
However, the deployment of fully renewable packages on a large scale requires gradual roll-out due to the limited availability of the bio-based plastics required for the manufacturing process.
A package produced from fully renewable materials can be identified from the marking, '100% renewable material'.
Valio has introduced plant-based plastic screw caps and neck fixtures in all of its gable top milk packages, which are claimed to be produced from more than 88% renewable materials.
Image: Valio tested Tetra Rex bio-based cartons with Eila lactose-free, semi-skimmed milk drinks from January to March. Photo: courtesy of Tetra Pak.