Soft drink giant Coca-Cola has admitted it is selling purified tap water in a bottle.
It says the source for its new Dasani bottled water is the mains supply at its factory in Kent.
The company says Dasani is "as pure as bottled water gets" due to a "highly sophisticated purification process".
But the UK water industry is worried that the marketing of the product implies tap water is impure, which experts say is not the case.
BBC NEWS