Instruct: Classify Amazon reviews into positive or negative sentiment
Query: They don't seal properly!

I don't know whats up with these because they don't seal right. You can store cookies in it and by the next day they'll be stale! Try storing rice in it and in two days half of it will be black full of mold, yuck! Even by the way the lids are made, you can tell they are the crappy type. They even hurt your fingers when you're trying to remove them. Its difficult to remove them but yet they don't do their job at securing it tight. I thought they were going to be like the other package of pyrex I had bought at JC Penny about two years ago, they look the same but are totally different, in the sense, that those from JcPenny close tight and don't let air in but not these, these look like imitation or something.