The promotion offers customers who purchase 330ml and 500ml bottles the chance to win £10,000 every day throughout February.
Consumers can enter the competition by inputing an on-pack code via text or through the website for Coca-Cola’s online loyalty scheme Coke Zone.
The advertising campaign featuring Duffy is geared towards the brand’s core female market and will run across Europe.
Coca-Cola said the campaign ‘will focus on the pressures facing 21st Century women’. According to the brand, this will be the biggest push behind Diet Coke in 15 years.
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