Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Glass Shattered

The kettle worked well for about a month. Appeared well designed and boiled quickly, but..... My wife was using the kettle to boil water for tea and the glass shattered as she picked it up. Luckily, she wasn't scalded. I won't be buying another one of these kettles. I don't want to risk another accident and there are other designs that work just as well.