(AAP) - Does Croatia's Prosek jeopardise Italy's Prosecco?

Croatia is gearing up to celebrate its entry into the Europen Union (EU), but don't pop the corks just yet.

A heated trademark battle over the country's beloved sweet dessert wine has some feeling less than bubbly, mirroring rapidly declining enthusiasm among Croats for membership in the economically battered bloc.

The EU has ruled that once the Balkan country becomes its 28th member on July 1, Prosek can no longer be sold under that name across the EU - even at home.

It maintains that Prosek's name is too similar to Prosecco, Italy's sparkling beverage.

And, it's not just Prosek that's in trouble of disappearing.

EU member Slovenia claims Croatia has no right to market Teran, a red wine made in the northern tip of the Adriatic shared by Italy, Slovenia and Croatia.

Croats are fiercely proud of their wine, a cherished product of the sunny, rocky Croatian islands on the aquamarine Adriatic sea.