Some 250 big organisations have now pledged to eradicate plastic waste by 2025, including Coca Cola, H&M and L’Oreal, up from 40 in April.
All promised that 100% of their plastic packaging would be reused, recycled or composted within seven years.
The aim is to combat plastic waste pollution, which is harming the seas.
The Ellen MacArthur Foundation, which is behind the campaign, said if current trends continue, there could be more plastic than fish in the seas by 2050.
The foundation was launched in 2010 by the record-breaking yachtswoman to improve environmental standards, particularly on plastic use, after she was shocked by the level of plastic pollution she observed on her round the world sailings.
An estimated 8.3 billion tonnes of plastic had been produced since the early 1950s, with 60% of it ending up in landfills or the natural environment.
And while packaging, such as bottles, yoghurt pots and wrappers, is not the sole source of plastic pollution, it represents the biggest use of plastic.