1) There is none for Epcot as a whole.
2) Some countries have tasting prices for several small glasses.
3) This is question often asked, but probably will never happen.
. . . it would foster drunks
. . . wines would have to be very similar in price
. . . there is no way to share the profits between countries *
4) Beside, if you drink-around-the world, some could make it part-way.
5) Imagine the pile-up of people between Italy & Germany.
* Some of the eateries are Disney-owned and some are not, so the bucks do not come out of the same pocket.