Pubs will soon be required to give customers free tap water - but some licensees are using the new law to raise money for charity.
By asking for a donation of 15p a time pubs across the country have raised £25,000 through the Tap into Wateraid scheme, which funds sanitation projects in lesser developed countries.
Brighton freeholder Chris Stewart, who owns the Prince Albert, is one of those who encourages customers who drink tap water to make a donation to WaterAid in return.
"We've always collected money for charity but when I went to India and saw the problems there I thought 'Tap into WaterAid' ticked all of the boxes," said Chris.
"It's really important, it doesn't cost us anything to do and the money goes where it's most needed. I hope more pubs and restaurants will feel inspired to get involved."
WaterAid's Cara Keane said: "We're hoping we will soon see both restaurant managers and customers feeling motivated to join in with Tap into WaterAid.
"As it costs just £15 for WaterAid to bring safe water, sanitation and hygiene education to someone in poverty, the momentum that we could create through this initiative would literally change lives.
"Water is life - there's no question of that - choose to Tap into WaterAid."
Under the government's mandatory code for the industry, pubs will be forced to provide free tap water from April 6.
To find out more, visit www.wateraid.org/tapintowateraid