A woman was caught by police after they were sent an anonymous tip-off that she had been drinking.
Sophie Hacker, 20, of Harbour Lane, Warton, pleaded guilty to driving with excess alcohol.
She was banned from the road for 17 months, and fined £110 with £40 costs plus £20 victims’ surcharge by Blackpool magistrates.
Presiding magistrate Irene Walton told her: “This was very foolish. It could have been more serious, not only for you, but other road users.”
Prosecutor Elliott Taylforth said that, on August 16, police received details from an anonymous source that Hacker had been drinking. At about 5am they stopped her in her Vauxhall Corsa on Lytham Road, Lytham.
A breath test showed she was almost twice over the limit with 63 micrograms of alcohol in her body – 35 is the limit.
Peter Cave, defending, said his client, who had no previous convictions, finished her shift at a fast-food restaurant at 2am and went to see a friend who was going to work abroad.
She had something to drink, decided to drive home, and someone rang the police.