Britons will be able to refill water for free from tens of thousands of shops, cafes, businesses and water fountains across England under new plans unveiled by the water industry.
The scheme aims to prevent the use of tens of millions of disposable plastic water bottles a year, part of efforts to curb the "harmful tide of plastic waste" on land and in the seas.
Using an app, people will be able to find the nearest refill point as the scheme is rolled out nationally.
A network of high street retailers, coffee shops, businesses and local authorities will offer refill stations in every major city and town in England by 2021, Water UK said.
Whitbread is the first company to sign up to the national scheme and has pledged to provide free drinking water for customers and passers-by in each of its 3,000 Costa Coffee and Premier Inn locations from March.
The national programme, which comes amid heightened public concern over plastic pollution in the world's oceans, draws on the success of the Refill campaign.
The campaign has more than 1,600 refill stations across the UK, with some water companies taking part in local schemes: Anglian Water in Norwich, Northumbrian Water in Durham, South West Water in Cornwall and Bristol Water in Bristol.
The Refill scheme, already taking place in 13 towns and cities in England, encourages cafes, bars, banks, galleries, museums and other businesses to sign up to a free app and put a sticker in their window to alert passers-by they are welcome to fill up their bottle for free.
Under the plans for a nationwide scheme, water companies will work with Refill to develop local action plans with partners, with the network and national app in place by 2021.
Some water companies are also looking at installing new public drinking fountains and restoring some historical ones which have fallen into disuse.
"We've seen a huge appetite for our Refill campaign across England, from individuals wanting to make a difference in their community to national chains keen to offer free refills to their customers,” Natalie Fee, founder of City to Sea, the organisation behind the Refill scheme, said.
"Our Refill app puts the power to stop plastic pollution in people's hands - and now thanks to the water industry we'll be able to help everyone, from local communities to airports, to provide free refills on the go."
James Pitcher, director of sustainability at Whitbread, said: "With over 3,000 Costa stores, Premier Inn hotels and restaurants the length and breadth of the country we can make it easier for people to refill for free, helping to reduce the number of plastic bottles being littered or thrown away."