When I lived in Japan, I used to drink Matcha tea everyday. Matcha is a finely-milled Japanese green tea. I usually add honey to my Matcha with a little bit of milk and it becomes the world’s best drink. Hot or Cold!
At the convenient store in Japan, you could find Matcha Milk which already includes the Milk. All you need is hot water and if you like it sweet, add a little bit of honey and you are set.