[One of the things that Kuroo has in his favour is his perception, he picks up on things that a lot of people would miss. In this case what he picks up on is Tsukishima looking in the direction of his mouth. He stretches it wider in its grin in return.]

Yeah, are you a vanilla latte kind of guy, espresso with a sprinkle of cinnamon? [Guess who knows nothing about coffee.]

Or maybe it's the Columbian roast that you'd really like some of. [And he takes another sip, getting some actual liquid from his cup filled with that Columbian roast blend.]