Step 5: Enjoy!
As the second and third picture show, however, adding soy milk to YeasTea causes its fluid components to settle out. While I was a bit unnerved to see my drink do this, the fact that a concoction of vodka, soy milk, and soda I like to drink does a similar separation act makes me pretty sure that this is due to the presence of a minute amount of alcohol in my drink rather than some scary, inadvertently brewed up toxin. Furthermore, I think the fact that I'm still here to write this after drinking several batches solo should support the idea that it isn't poison.
On a final note, I hope it should go without saying that you shouldn't drink the layer of yeast cake at the bottom of the vessel; not only will pouring the yeast cake into your cup probably give your drink a strong, "yeastie" flavor, but in consuming the little guys you won't be able to reuse the yeasties left over to brew another batch of YeasTea.