Vio is being trialled in three US cities. Photograph: Vio

It may not quite sound the real thing but consumers are being asked to decide whether milk goes better with sparkling water, cane sugar and fruit flavouring.

Coca-Cola is trialling a new carbonated "vibrancy" drink and it will depend on Americans' tastebuds whether other countries experience what the company claims is "a refreshing sensory experience".

The soft drinks giant has so far launched its new Vio products only in New York, but milk-based products are popular in Asian markets such as Hong Kong and Japan.

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