Luxury foods and drinks are, how do I say this? Not the kind of food and drinks you have in order to take in nutrients.

They are something you consume for taste and flavor or stimulant effect rather than nourishment.

Asides from coffee, there are other like tea, sake and candy.

Even the cola at Kourindou is a kind of luxury drink.

If that is so, then everyone doesn't need to eat them.

Well, we don't absolutely need to eat them.

But once you've try it, it becomes a habit.