Product review (4 stars): GOOD QUALITY
I have had the wine bottle burner covers for about 6 years, and they are still going strong, I just got  tired of looking at them. So I don't think you can call them flimsy. All thin metal can warp when heated, but they flatten back out at room temp. So if you are not wanting cast iron, these covers will do the job they are designed for- covering your burners to keep them clean.