Britain is a nation divided over the topic, with 53% preferring chocolate chilled in the fridge, compared to 47% who prefer a room-temperature bar, according to Cadbury research.
Printed in five designs with thermochromic technology, the wrappers transform to reveal an ice-blue design overlaid on white blanks.
One of the designs is for a brand-new flavour, released specially for the summer: Iced Latte. It combines a coffee cream interior with biscuit pieces, enveloped in Dairy Milk chocolate.
Mara Popa, brand manager at Cadbury parent company Mondelēz, said: "We know that over half the nation are already chilling their chocolate, and we're ready to truly embrace this debate! With our limited-edition Cadbury Dairy Milk Summer Edition Bars and innovative colour-changing packaging, we're celebrating the fun and unique ways people enjoy their chocolate.
“This special pack design highlights the chilled chocolate trend in a playful way – so whether you are team fridge or team cupboard, the choice is yours."
Cadbury also found the nation divided nearly in half on whether eggs, ketchup and jam ought to be stored in the fridge, with 49%, 48%, and 51% saying ‘yes’ respectively.
Least divisive were mayonnaise – with 70% of respondents saying it belonged in the cooler – and olive oil, which saw 2% take the unusual step of storing it in the fridge.
