I drove by last night and stopped in at Soy cafe to pick up some frozen mint soy milk in an "icy pouch", which you can let thaw a bit and eat like a slushy. It is quite yummy. I also picked up an icy pouch of Vietnamese Coffee, which sounds like a great summer treat: a coffee popsicle!
They said they are open to 10:00 pm. Since the last search I did of Soy Cafe (or is it soycafe?) turns out up old posts referring to their limited hours and the sign on the side of their building still says they close at 3, I thought I would mention it. I haven't yet tried their fresh home-made soy milk, but the frozen version is tasty. They are also open Saturdays now; or, at least, they were open last Saturday. They have home-made bean curd too: a sweet ginger version and a tumerici/something flavor.
It is a small cafe on Hyperion, between Lyric and Fountain (I think)
Here's a link to one of the old threads with more details: