The permanent change will prevent the equivalent of nearly 4 million plastic water bottles from entering the ocean annually.
Also Lidl's changing all milk caps from coloured to clear, further boosting their recyclability.
Lidl GB has announced it will be incorporating Prevented Ocean Plastic™ into its water bottle and is the first UK supermarket to make this change.
Appearing in store throughout July, Lidl’s 1 litre San Celestino Italian Sparkling Mineral Water bottles will contain a minimum of 30% Prevented Ocean Plastic™, plastic which would otherwise have ended up in the ocean.
With 12 million bottles of the everyday item sold annually, this initiative is expected to save nearly 100 tonnes of plastic from entering our oceans annually, per year, equivalent to almost 4 million plastic water bottles.
The move builds on Aldi's previous efforts in being green. Lidl has been leading the way since 2020, when it became the first UK supermarket to introduce food packaging using Prevented Ocean Plastic™.
Since then, it's been rolled out across a range of Lidl’s own-brand fresh fish, breaded poultry, sausage and fresh fruit products, meaning Aldi's already prevented the equivalent of in excess of 15 million plastic water bottles from entering the ocean.
Doubling down on their commitments, Lidl is also taking steps to improve the recyclability of its plastic. Last year, the discounter transitioned its semi-skimmed fresh milk with supplier Müller over to clear caps from coloured.
Over the next two months, in partnership with both Müller and Cornish Farm, it's transitioning its entire milk range to clear caps.
The rollout of colourless milk caps this year will support industry wide retention of 4000 tonnes of bottle top material to be used again within the food sector.
Shyam Unarket, who is the Head of Responsible Sourcing and Ethical Trade at Lidl GB, said: “Ocean plastic pollution is a pressing environmental concern, it is expected that by 2050 there could be more plastic in the ocean than fish.
"As pioneers of integrating ocean bound plastic into our packaging in 2020, we have been consistently building and improving on our efforts since, and are proud to now extend Prevented Ocean Plastic™ into water bottles. Through this latest product development, we hope to inspire wider efforts across the industry.”
Prevented Ocean Plastic™ packaging, supplied and developed in conjunction with Bantam Materials, is made from discarded water bottles found in Southeast Asia within 30 miles of a coastline or major waterway that feeds into the ocean. This waste is then sorted and processed before being used in packaging. The entire process is fully traceable with a robust documented chain of accountability.