As others have mentioned, unfortunately it depends on the agent you get. I flew a couple of weeks ago with my 1 year old. I had 3 jars of baby food for her. The label had fallen off of one of the three jars. The TSA "pre-screener" for liquids gave me a hard time because she didn't know how much was in the jar....um...duh...look at the label on the other two jars. She let me through with it, but warned that the checker at the x-ray machine may take it away. You just never know 
