The new bottles will have a cloudier and greyer appearance than those that do not contain recycled plastic and the Co-op said it accepted that they could test shoppers’ environmentally conscious credentials.

The new bottles, which are 100% recyclable and sourced in the UK, will be in stores later this year.

The supermarket has estimated that the change to all of its own-brand still, sparkling and flavoured water bottles will save almost 350 tonnes of plastic every year.

It has also said it plans to rid its aisles of black and dark coloured plastic by 2020 because it is harder to detect by sorting machines due to its pigment and contaminates the recycling stream, reducing the usefulness and value of the recovered material.

Co-op Food’s chief executive, Jo Whitfield, said: “Our customers expect us to respond to this challenge and help them make more ethical choices, and we’re dedicated to doing just that.

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