Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unworthy of the Pyrex name!

I have been using Pyrex products for years and have always found them to be incredibly durable, sturdy and versatile.I owned the rectangular casserole dish in cobalt for less than a month before it BROKE in the oven. I have the same product in clear, which I have owned for 7 years (as well as older versions of the same product that I inherited from my grandmother), and although I can not be certain that it is specifically the fact that this version is tinted cobalt that caused this problem, I can't ignore the fact that I haven't ever experienced this problem before with the clear ones AND the fact that apparently other reviewers have experienced the same thing.If you purchase this product, just be careful. Hopefully you'll have more luck than I did!