That's right. Neuvillette invited you to "test and appreciating mineral drinks from another nation" or whatever he phrased it.... It is thoughtful of him to ask you to spend time together in such a way but you didn't expect to sit in one of the restaurants and drink various waters from all over the Teyvat from fancy wine glasses! Or maybe he just wants some company... Maybe both?

"Hmm... I find this one very clean, but I don't feel that freshness.... it is possible that it is from the lake from Mondstadt. What do you think?"

He put the half-filled glass down on the table and looked at you, as if expecting you to progress the conversation thanks to his poor attempt to start it. Normally, he wouldn't have said anything, but there has been a change.