Why do wine bottles have concave bottoms?

If you have ever noticed that there is a dimple in the bottom of your wine bottle and wondered why the bottle has a dent in the bottom then you are in the right place to find an answer. This dent in the bottom of your wine bottle is more commonly called a punt.

Wine Bottle Punt

There are many different reasons why this is. Here is a good list of some of the rasons that I have found.

  • Status Symbol – The larger the punt, the better the wine.
  • Stability – It decreases the chances that the bottle will topple over. If there is less surface area in the middle then there is almost no chance that the bottle will be wobbily. If you had a wine bottle with a flat bottom, it would only take a small imperfection in the glass to make it unstable.
  • Glass Blowing Issue – It is a throwback to when glass bottles were blown by hand. It hides any imperfections that might be in the glass where the glass blowing tube was attached to the molten hot glass.
  • Sediment Collection – Some wines, if not properly filtered will still have some sediment in them. This is true of older wines that have been aged for many years. The sediment will form a thick ring around the bottom of the dent and not be easily removed by pouring the wine.
  • Manufacturing – The punt is used in the manufacturing process by being the spot where the bottle can rest securely on conveyor belts while it speeds along in the filling process.
  • Strengthens The Bottle – The shape and the thickness of the punt is also used to increase the strength of the wine bottle which will allow the bottle to hold beverages that are under pressure like sparkling wine.
  • Holding and Pouring – It provides a nice place for the person pouring the wine to place their thumb which aids in pouring the wine.
  • Optical Illusion – The punt can trick a customer into thinking that the bottle is bigger than it actually is and that it has more value than the other brand of wine on the shelf next to it.
  • Secret Messages – There is a legend that says that in ancient times the servants in the houses of the nobles would know party guests better than their masters would. To show whether a guest was reliable or not a servant would put a “thumbs up” inside of the punt while pouring the wine.
Wine Bottle Punt Close Up

Now that all of your wine punt related questions have been answered, you can comfortably enjoy your well balanced, sediment free wine and thank the punt that is tucked away on the bottom of the bottle.

Wine Bottle Dent

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I am just a writer that needs some attention. I am also a fun loving wine maker. The logical conclusion was the combine the two. If you want to follow all of his journeys online stalk him at Twitter.com/Trovrt

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