Coca-Cola is to test a paper bottle as part of a longer-term bid to eliminate plastic from its packaging entirely.
The prototype is made by a Danish company from an extra-strong paper shell that still contains a thin plastic liner.
But the goal is to create a 100% recyclable, plastic-free bottle capable of preventing gas escaping from carbonated drinks.
The barrier must also ensure no fibres flake off into the liquid.
That would pose a risk of altering the taste of the drink – or potentially fall foul of health and safety checks.
But industry giants are backing the plan. Coca-Cola, for example, has set a goal of producing zero waste by 2030.
Coca-Cola was ranked the world’s number one plastic polluter by charity group Break Free From Plastic last year, closely followed by other drink-producers Pepsi and Nestle.
Under pressure
The Paper Bottle Company, or Paboco, is the Danish firm behind development of the paper-based container.
Part of the challenge has been to create a structure capable of withstanding the forces exerted by fizzy drinks – such as cola and beer – which are bottled under pressure.
On top of that, the paper needs to be mouldable, to create distinct bottle shapes and sizes for different brands, and take ink for printing their labels.