Some wine bottles have indentations on the bottom (dimples). These dimples are called, “Punts.”
Do the punts in wine bottles have a purpose? Is the wine bottle better because it has a punt? Is the wine inside a wine bottle with a punt of better quality? The answers to these three questions are, “No, No, and No.”
Many moons ago, when wine bottles were hand blown, the punts did have a purpose—to eliminate the piece of glass on the bottom of the bottle which caused the bottle to be uneven on the bottom and be unstable.
Now, with modern manufacturing methods and tools, wine bottles don’t require a punt. Flat-bottom wine bottles are just as strong and cost just about the same as wine bottles with punts. So why have them?
Some say that punts make the wine bottle stronger. Others say that punts help trap sediment. Waiters often pour the wine by sticking their thumb in the wine bottle punt.
Frankly, punts are probably an aesthetic remnant from the days when more expensive wines came in a wine bottle with a punt.
To punt or not to punt is totally up to you.
Here are some links that provide some additional thoughts on wine bottle punts: