Fonterra sustainability director Carolyn Mortland said the dairy co-op had entered into a partnership with Future Posts, which recycles Anchor milk bottles into fence posts that can last up to 50 years.
In New Zealand, 90 per cent of Fonterra's packaging is already re-usable, recyclable or compostable. Mortland said the remaining 10 per cent was proving difficult.
"It's the plastic yoghurt pottles, straws, single butter dishes that you get in hotels, and foil seals on drink bottles," she said.
Fonterra aimed to achieve its recycling goals through a combination of investment and partnerships with suppliers, other companies and local authorities.
Mortland said Fonterra had also teamed up with the Sustainable Business Network, which includes small and medium businesses, not for profit organisations and councils.