Tea is just a bunch of dried leaves in hot water. Historians argue about when and where tea was invented, but it was likely first made by someone too lazy to remove a leaf that had fallen into their cup of hot water. Then it took many years before some nonpoisonous leaf that also tasted good fell into someone's cup. Then it took even longer for people to add milk and sugar and to stick out their pinky finger while drinking it. This led to the invention of teapots and the "I'm a little teapot" business. It took still more time for some people to add poison back to tea so that Agatha Christie mysteries could be invented.