I will try not to make so many assumptions in the future.
matcha: Japanese green tea powder. Its has the consistency of baking powder (a white leavener often used in biscuits), the flavor of green tea (antioxidant drink made with dried leaves and water, typically served hot; extremely healthy although it makes some people, like me, feel ill), and the color of wasabi (a fiery bright green paste served with sushi. Sushi? It's this raw fish, dried seaweed, and cold rice thing they do in Japan and though it sounds nasty, it's really great, trust me.) You can buy matcha at the supermarket in a tiny canister and use it to make green tea ice cream.
kombucha: Ancient fermented tea drink with roots in Asia and Eastern Europe that has recently become trendy. Many health benefits are attributed to kombucha, though few, if any, have been supported by scientific studies. It's quite tasty, tart and spritzy, though it takes getting used to. If a bad batch doesn't send you to the E.R., I'm quite sure it's healthier than a Pepsi (dark, sweet, carbonated soft drink. According to legend, if you put a baby tooth in a glass of Pepsi, it will dissolve in 24 hours! Would be interesting to put a baby tooth in a glass of kombucha.)
horchata: A Latin American beverage you will often find at taquerias alongside those fresh fruit drinks that are so yummy. I think horchata is yummier. It's thin and milky, though it doesn't contain milk, and is made (variously) with ground rice (ok, I'm done), cinnamon, sugar, vanilla, and almonds.
Happy Memorial Day, everyone.