Very sturdy easy to clean. Great for blending with my stick blender. My daughter in law, saw them and said I want them, so now I have 10 instead if 12.I just received mine today. There were no dents or scuffs. They feel thick and heavy and made of high quality stainless steel. The manufacturer doesn't say but they are supposed to be SS304, aka 18/8 and 18/10. I selected this brand because at least the seller is an American company (items made in India) but more importantly, there were no bad reviews about rust or defects.They feel great in my hands but one thing about steel is that it sweats more over plastic, so drinks might not stay as cold as long. But no more worrying about plastic leaching or plastic shards as plastic cups get scratched and slowly disintegrate. And no more broken glass cups!I'll update this if I discover rust forming or any other issues.I've always been frustrated that my drinking glasses didn't hold enough volume, so I sought to solve that problem with these stainless steel malt cups! I ordered one of the larger sets of them, and have been pretty happy with them. 2 of the dozen leaked at the spot welds, which is why it's only getting 4 stars. I'm sure if I would have asked about it I could have gotten replacements, but as it was, I had use for them in other ways so I didn't try to push the issue.They are well made, hold a lot, and shiney... what more could you want?After melting many tumblers in the dishwasher we switched to these. Wish we would have done so years ago!good priceFamily has really enjoyed making shakes and malts in these!GoodIts the best product