Brew and Wine Supply said:History lesson:.... capsules were first used in wine shops to keep the customers form comparing bottles to get the one with the most in it. With a capsule on it you can not compare amounts.
Tip the bottle up side down and compare the air bubble? Lol
That is still a good practice, if you can see the top of the wine. Today, since most commercial wine bottles are filled by machine (I know, not all of them!), each same-brand bottle should be at exactly the same level. Comparing levels can help you spot a bottle that has a slightly leaky cork.
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