In this context, "sells water" specifically refers to selling bottled or packaged water, not all kinds of beverages. Here's a breakdown of what it means: * "Sells water": Refers to selling bottled or packaged water. * Contextual Meaning: The speaker is likely indicating that the shop sells water as a drink option, not implying a variety of beverages. * Implication: It may imply a limited selection, focusing on water rather than a range of drinks like soda or juice. Summary: * "Sells water": Usually means just water, not all beverages.

‘Getting a drink’ often refers to a social engagement with the drinks being alcoholic. ‘Water’ would generally not encompass other beverages. However, a store that sells water would usually sell other beverages too. A: Let’s get something to drink. (Because I’m thirsty) B: There’s a store around the corner. (Of course both would understand that it sells things to drink.) A: Let’s get a drink. B: We passed a place that looked good. (Both people would understand that it’s some kind of bar or restaurant )

The example you present look strange. To get "a" drink means to go out with someone in a bar or a restaurant. It doesn't have to involve alcohol, but it usually does, just like getting a "coffee" in a café doesn't have to involve coffee, you can have tea instead and it will still be okay to say that you "went out for coffee". Water only means water. It seems like person nr 2 is not interested in going out with person nr 1, so to avoid being rude, they suggest to go and buy water in a shop instead.