I've heard it said that when you serve a drink, in addition to the complimentary drink, there's a large glass that's designed to be used for mixing drinks? What's that?

Hello, Bear is happy to answer your question!!!!

Listening to you, you should be asking to go to the bar to drink after ordering a set menu of wine, the waiter in addition to foreign wine, snacks, and drinks in addition to a cup, right? Oh, this cup is used to mix wine and drinks with, in foreign countries, the name of this cup is called mix cup, that is, mixing cup, because if not pure drink wine, then you need to have a container to mix the drink and wine.

The glass you are talking about is not the kind of professional mixing glass in cocktail making, but just a general mixing glass.

Thanks, glad to answer your question!!!!