Special herbal tea for 10k. It's a cute little place which you can sit in or have the drink to take away. It's already made so they quickly scoop it in to a small cup for you, although that means it's not possible to get it with less sugar.
The predominant taste was ginger and cinnamon, I think, although it had lots going on and was really interesting. I won't be having it regularly but it's definitely worth a try.