Apparently the rules about lids have changed. Here is the first thing I read about it. http://www.washingtonpost.com/lifestyle ... story.html Upon further research, I found this video about it and it seems the change is in the lids. http://www.youtube.com/watch?v=WW141FyMSXE I usually buy Bernardin lids, so I'm going to check the packaging. I need my food to stay sealed for at least a year!