Do those metal wine collars that fit around the neck of the bottle actually improve the taste?!

Question:

Do those metal wine collars that fit around the neck of the bottle actually improve the taste?

I don't know if that is what the real name of it is, but it is a silver clamp that fits around the bottle neck and supposedly improves the flavor. Someone brought one to a party. I tried the red wine with and without the collar, and I observed no difference. Have you tried one of these? If so, what did you think?

Additional Details

7 hours ago
I had a feeling the salesman who convinced him to buy it was making it all up.

Answers:

It's just a drip catcher. It has nothing to do with the flavor. When you think about it, it doesn't even *touch* the wine...how can it have any effect on the flavor?
You figured out the BS right away.

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Do those metal wine collars that fit around the neck of the bottle actually improve the taste?!

Do those metal wine collars that fit around the neck of the bottle actually improve the taste?

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