You'd think I would have learned the first time

Isaac and I got 2 sets of these storage containers from Crate and Barrel when we got married. A couple of months ago I was microwaving leftovers in one of the medium sized container when I heard this loud pop. Well, needless to say that was the container breaking in half. I just did it again!!!! I am going to have to go to Crate and Barrel and see if they'll exchange them for me. They are supposedly microwave safe...