This thing is very cool and if it were juuuust a bit bigger it would be perfect. Overall the construction is very nice, the magnets seem plenty strong (unlike what some of the other reviewers said), and it’s so clever how you don’t have to slip it over the top of the bottle which can shred the felt on other wine collars. But the reason for my low rating is that it only works on some bottles if you tear off the foil. We have not tried it on enough bottles to say if there are even larger bottles out there that it wouldn’t fit even without the foil on. This is a very cool wine bottle collar but it just doesn’t work sometimes doing the one thing it’s designed to do. I get that you can’t make it too big because then it would just fall off the bottle the bottle when you tip it to pour, but it’s a design fail in my book. Would love to have one that’s just a bit bigger.