Cancer Research UK has raised nearly £4m from its inaugural Dryathlon campaign.
More than 35,000 people signed up to take part in the scheme, which encouraged people to give up alcohol for the whole of January and donate the money they saved to the charity.
Dryathletes – those who had signed up to the challenge – were also encouraged to seek sponsorship from friends, family and colleagues.
"Online sponsorship for the Dryathlon closed at the end of February and we have raised just short of £4m," a spokeswoman for the charity said.
According to the charity’s Dryathlon Facebook page, male fundraisers brought in an average of £143 each and female fundraisers £118 each.
The dedicated Dryathlon microsite offered rewards in the form of online badges and trophies – it allowed participants to form teams and move up the leader board.