グラスを２つもらえますか？って英語でなんて言うの？

It is common to share beverages so it is ok to say, "Please bring us one bottle and two glasses", and "I would like two glasses please." If they only bring one glass you can say, "Can I get another glass?", "I need two glasses please", and "we will be sharing the drink so can we get a second glass?"

"Can we get two glasses?" is the most direct way to ask the question. It is stating that you would like two containers for drinking; however, it is not the most polite way to ask. When making the request, if you include please, this will be polite. You can make the statement that you would like, or it would please you to have two glasses, or you can politely as if you could have two.

Both 'could I have' and 'I'd like' express to the waiter or waitress that you would like something. Whichever option you choose to say, don't forget to be polite and add 'please'. You can add please either at the beginning or end of the request, it makes no difference. If you already have one glass and just require another one you could ask 'please could we have another glass'. Another means one more.

When you are sharing a bottle of drink with someone then you might need more than one glass, to tell the waiter/waitress that you require more glasses then you would say 'can we get two glasses please?' or 'can you bring us two glasses please?'

To ask for two glasses when they only brought a bottle with no glasses would be "can we get two glasses?" using the word "get" which means come to have. You can also say "could you bring us two glasses, please" to express the possibility of the waitress getting you two glasses. Lastly, you could say "would you bring us two glasses, please" which expresses not only the possibility but the willingness of waitress to get you two glasses. A common joke is "could you bring us two glasses, please?" - "I could." *doesn't move to get the glasses* "Oh, I'm sorry, 'would' you bring us two glasses please?" and then the person would go get the glasses. This is common as the waitress has the potential to get the glass but doesn't want to.

When requesting at a restaurant, we usually start with "May" or "Can", May is more polite. I always use May when I ask for something because it shows respect. Of course, it's not necessary and it is still very polite if you ask Can we get 2 glasses please? I would always say please at well. If you already have glasses at the table but you would like 2 more, you can say Can we get 2 more glasses please? or May I have 2 more glasses please? If you would like to be really really polite, start your request with "Is it possible..:"Is it possible to have 2 more glasses? Is it possible to have 2 glasses with that?