Via my sister on facebook-
"I've been receiving unwanted free samples of formula since [second daughter] Yaiza was born. Now I just received a letter from the Similac company saying the formula they sent me may contain beetles and or their larva[e]. Isn't that great?"
Yikes! I found the news article about it here.
Pretty disgusting, although probably not that unusual for things like this to happen in overgrown, over-industrialized, corner-cutting, corporate, food-and-drug-processing plants.