Matcha, aka the purest form of green tea, is a powdered type of green tea that's whisked into hot water to create a bright green, rich cup of tea. Mixed with milk for a latte, it looks beautiful on Instagram. Unlike most other colorful lattes, matcha is caffeinated, which means it can give you a little boost while also brightening up your day. Its relatively high caffeine levels have an effect on many people called "alert calm," aka a state of peaceful awakeness. It's also delicious and goes really well with a book and a croissant, in my personal experience.