Self-Chilling Coca-Cola

Drinks giant Coca-Cola has invented a bottle that chills on the inside when the top is twisted off. [...] The bottles do away with the need to add ice, which dilutes the liquid - but they must be put in a special vending machine to regulate temperature.
via: OhGizmo! » Archive » New Self-Chilling Sprite Bottles From Coca-Cola
Coca-Cola Introduces Self-Chilling Bottle - Geekologie