"Funky" cardboard polling booths used for the first time in England "simply did not work", a council has admitted.
Cornwall Council promised a polling booth "revolution" when it spent more than £11,000 on 700 cardboard booths.
But when the booths, introduced to save money, were used in European elections in 2014 the council found "issues with their privacy and stability".
The booths have been withdrawn and the council will revert to plastic and wooden models for the General Election.
The minutes of Cornwall Council's constitution and governance committee state: "The cardboard polling booths which had been trialled previously simply did not work due to the issues with their privacy and stability."
At the time of the launch in May 2014 council's deputy elections manager Dave Cunningham described the cardboard booths as "funky".
The booths cost about £15 each whereas wooden booths cost about £92.
A spokesman for Cornwall Council said it "may consider" using the cardboard booths for Police and Crime Commissioner elections in 2016.