As someone who literally spent a year in Epcot, here are my favorites & hidden gems:
Canada: Beer cart, take the plunge & get the La Fin Du Monde (its a triple styled golden with hints of citrus, similar to a blue moon but way better and it's 9%) OR if it's fall season, get the Pumpkin Ale, best I've ever had. They only sell popcorn but if you head up to the gift shop they'll be able to find some soft maple sugar candies, in the shape of a maple leaf and they are to die for.
UK: Rose & Crown; cocktail: Welsh Dragon, sweet, pineappley, and bright green, it's delicious. Also a great place for a beer, or combo drink. Take a look over the menu, I like the cider with blackcurrant juice, can't remember what it's called. Not a lot of snack options here, but you could easily grab a candy bar from the merch shops.
France: Grab a slush drink from the stand & any treat from inside the bakery, they're all amazing.
Morocco: I usually go for sangria inside Spice Road table here. Also a great spot to grab a quick service pita platter or something and split between everyone.
Japan: Green Tea colada inside the little sake stand in the middle of the pavillion, or they have some sparkaling sake in the sake store in the very back that are my go to's. There's sushi or you can grab a side of something from the QS
US: Any kind of beer, a lot of it changes seasonally, but I like the hopageddon, which is very simliar to the fin du monde but more bitter. Stop and watch American Music Machine while you're here.
Italy: Head to Tutto Gusto wine bar for an espresso martini & any kind of snack/appy off the menu. Or head to the wine shop on the front left for a glass of rose regal, a sweet sparkaling red wine.
Germany: Literally anything from the caramel shop, then head all the way through the shops to the wine shop in the back to grab a cheese plate & wine flight. Alternatively, grab a grapefruit beer from the outdoor stands (this is also a HUGELY GREAT decision if you're feeling it, these are only 2% and can pace you better)
Outpost: Get a water. Seriously. Also if you like amber beer's you can get a safari amber here, delicious.
China: I usually skip China for drinks, I still haven't found anything I like. For food though they've got TONS of great plates for sharing, and the chicken fried rice is a HUGE portion, and if you started in canada you probably need it by now. Watch the chinese acrobats while you eat!
Norway: Grab a treat from the bakery. I also usually get a viking coffee. People talk about the viking shot like it's deadly but it's one of the easiest shots I've ever taken.
Mexico: I usually grab food from the QS place, even if it's just nachos. If you want a standard margarita, get the fiesta one from the other outside stand. Head inside for an avocado margarita or a cucumber margarita.
Finally if you're around Epcot, head over to "Taste Track" a little food truck over by Test Track that has gourmet grilled cheeses that are delicious! It closes at 4 or 5 though so be careful.
**ALSO, tips if you do plan on actually "drinking around the world" PACE yourself, it's fun to get drunk but it's super embarrassing to be that wasted when families and children are around, and the sober people hate you. Do multiple loops around the showcase and get a drink in every second country (this option also allows a more convent stop at that grilled cheese cart

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