Does anyone remember these?
I remember begging my mom for them (because it was the 1970s and it was on TV, so obviously it was vitally important). I swear I even remember the taste, which was ... as described in this article ... kind of like a Tootsie Roll, but worse. But, like Tang, the astronauts were supposed to like the stuff.
I seem to remember that the commercial showed an astronaut in full gear bringing a Space Food Stick to his mouth and a tiny, space-food-stick hole opening in his helmet so he could stuff it in. Even as a child I knew that holes in space helmets were a bad thing.