Blaze's Template.parentData() in React container pattern?

Following meteor guide v1.3 for react integration, I can’t seem to find a way to pass parent component’s data to child component’s container. In blaze you get Template.parentData(). Here is what I’m trying to do:
I have an App component that subscribes to all posts and renders them as Post component. I need an individual post’s id in the PostContainer’s createContainer() function so that I can subscribe to its comments publication. How do you pass props to child component’s container function?
I’m not sure if that is good pub-sub pattern in React or that’ll work at all, but that’s how I usually do it in Blaze. Any idea, can you give me/point me to an example?