If I would want to order a beer, I would normally say "I want a beer".
But if I want to order two of them, do I say "two beers" or "two glasses of beer"?
On the one hand, "two beers" feels more natural, and if the beer comes in glass bottles that would make sense, as it would be about two separate things. However, I also feel that "two glasses of beer" may be more grammatically correct?
Beers vs. glasses of beer
grammaticality
Best Answer
"Two beers" is fine. In general, you can use the names of foods or drinks as countable nouns to mean "one serving": for instance, "I'll have a tea and two ice creams" = "I'll have a cup of tea and two bowls of ice cream." This may sound slightly informal, but it's not "ungrammatical": native English speakers use constructions like this all the time.
(This construction doesn't work with some foods: at least in my opinion, it sounds more unnatural to ask for "a rice" or "a bread" when you mean a bowl of rice or a loaf of bread." I can't think of a good rule that explains this. But again, to your question, "two beers" is fine and very common.)