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

The glasses are marvelous...they DO keep things cold for a long time. And they do keep things hot for a long time.But for pity's sake, be VERY, VERY careful how you put them down or how you wash them. I had the temerity to handwash one and -- in the water, mind you -- it bumped the side of the sink.I had hundreds of shards of this "glassware" material.Another one glanced against the spigot as I was rinsing it -- being extra careful mind you -- and it exploded in my hand.Another had the misfortune of another -- REAL -- glass bumping against it in the drying rack. A huge chunk fell out of the side.A HUMONGOUS WASTE OF MONEY, unless you are willing to treat them extremely carefully.NOT for everyday schlubs like me!