Sainsbury's says it has an "ambitious" plan to halve its plastic packaging by 2025 - saving 60,000 tonnes of plastic packaging each year.
Last year Greenpeace ranked the store at the bottom of the ten biggest supermarkets for its plastic policies.
The supermarket's chief executive Mike Coupe says they face a balancing act between reducing waste and ensuring food's maximum shelf life.
Sainsbury’s reduced plastic packaging by one per cent in 2018 and the latest plan will include alternative materials, lighter-weight plastics and refillable packaging.
For plastic milk bottles - one of its largest sources of plastic packaging - Sainsbury’s is 'including the introduction of refillable bottles, introducing returnable milk bottles or offering a reusable jug with milk in a lightweight plastic pouch'.
Sainsbury's says it will work with Greenpeace and 'report publicly on progress every six months'.
Chief exec Mr Coupe added: “Reducing plastic and packaging is not easy.
"Packaging plays a vital role in keeping our food safe and fresh and minimising food waste.
"We must therefore find alternatives to plastic that protect the quality of our food while minimising our impact on the environment.
“We can’t do this on our own and we will be asking our suppliers and our customers to work with us to help us make this important change.”
To read the Greenpeace supermarket report mentioned above from 2018