Instruct: Classify a review as either positive or negative.
Query: good and bad

I love these glasses, until they break. I bought two seven months and used them for hot tea. They're absolutely perfect for all the reasons others have mentioned. The second one cracked yesterday - a slight crack around the circumference of the inner layer. I don't think I did anything to cause it to break. The other one broke on the bottom of the inner layer, and again, I don't remember doing anything to cause that. So now I'm trying to decide whether to buy two more. Tea just wasn't the same this morning, but it's pretty expensive to keep replacing them.12-30 I decided to buy more and it was the right decision. I still love these glasses!