Channel Seven’s current affairs program Today Tonight has been banned from alleging that a petrol company sold inferior quality Coca-Cola products in its convenience stores.

United Petroleum yesterday successfully sought the injunction in the Victorian Supreme Court against the Seven Network, which also bans the imputations from the "hidden camera" story being promoted on its website.

United’s national merchandise manager Mark Harris wrote in an affidavit that a Today Tonight producer approached the company’s marketing manager to inform her that the program was going to run a story on the sale of imported products by Australian retailers, including certain Coca-Cola products sold by United.

He said the story would specifically reference 500 millilitre Coca-Cola from Hong Kong and 375ml Coca-Cola from the USA.

"(The producer) Ms (Tineka) Everaardt explained that Today Tonight had investigated a number of United’s stores and had taken video footage of person purchasing certain products from a United store in Queensland with a hidden camera," Mr Harris wrote.