It is a household name which has become one of the world's best-known fruit drinks and is enjoyed by children in 22 countries across the globe.
But it took only two school pupils to tackle the might of the makers of Ribena in a court case which ended in the company being fined almost £80,000 for misleading advertising.
The case came to court in New Zealand after students Anna Devathasan and Jenny Suo challenged claims over levels of vitamin C in the blackcurrant drink.
Ribena is sold as a healthy drink by GlaxoSmithKline (GSK), with advertisements stating that it has more vitamin C than orange juice.
But when the then 14-year-old classmates tested the syrup-based drink as part of a science project in 2004, they discovered that it contained almost no trace of vitamin C.
A lawsuit was filed by the Commerce Commission, the national consumer watchdog, and yesterday GSK admitted 15 charges of misleading advertising between 2002 and 2006.
The company was fined 217,000 New Zealand dollars (£80,000) and was ordered to run corrective adverts and post a message on its website.
Ms Devathasan, who was with Ms Suo in court, said the pair felt "quite proud".
She added: "If we hadn't done that science test three years ago, Ribena could have been promoted as vitamin C full for ever. We're just blown away that anything we could have started as a consumer could have blown up into something so huge."
Adverts in New Zealand claimed that Ready to Drink Ribena had 7mg of the vitamin per 100ml. The high school students found that the drink had almost no trace of vitamin C.
The Commerce Commission said that the company's behaviour was a massive breach of trust with the public.
GSK told the court that it had not deliberately set out to mislead consumers but that the fault lay with its testing methods.
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