Is it sauerkraut?

Something in my office is stinky. I can't smell it, but everyone who has come into the office has commented on it. I am afraid I might be the culprit. I brought some boiled dumplings to work today. They smell stinky if you put them in a ziplock bag, but I had to because I didn't have time to eat them in my apartment this morning.
Anyway, I hope it's not me.