These looked lovely on my table Christmas morning. After 1 use I washed them as instructed- warm water-hand wash only. I own several sets of antique crystal but these are the thinnest glasses I've even owned. I washed one, put it upside down on a thick pad and went to wash another glass. As I was washing another glass I heard a crack and the first glass had spider cracked from the stem up into the goblet. I continued washing the other glasses and two others broke in a perfect circle about .25' from the top of the glass. The last glass ended up having a small crack from the stem up into the goblet. So all 4 broke.