Among the four digestive chambers hoofed creatures possess, it is the cow's reticulum lining that is getting all the culinary play, particularly its protein-rich "honeycomb" lining (shaped and textured like the bee variety).
That's convenient for people who live in their headgear 40 hours a week, but it's also nice for companies where employees share helmets -- after all, it'd be nice to take out your own lining so that you're not sharing the same sweat-soaked padding with someone else.