Change my opinion: These glasses only last approximately 12 months. We washed them on top shelf in dishwasher and I don't use the heating cycle. They started cracking and then leaking water all inside between the rubber and plastic outer coat. Will not try these again. 

Initial comment:Purchased recently and have had them a short time. The glasses are beautiful. Had favorable comments from family. sturdy and heavy. hope to get years of use.