Glass bottle production line

4 Types of Glass Bottle Cork!

Have you ever wondered why there are different types of cork to close glass bottles?

Which are the best?

In this post I will tell you more about the 4 main types!

Cork is a fundamental component for a high quality glass bottle.

Every type of cork has advantages and disadvantages.

I’ll show you them!

Are you ready? Let’s start!

Glass bottle are very different from each other and every kind of them has its own cork.

1.Natural cork

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This is the oldest type of wine cork. Natural cork was choosing because it has a lot of good properties: it’s waterproof and elastic therefore the cork isolates wine from the external agents, but it has natural microporosity that allows gas exchange. It’s the only cork that lets wine to live and mature in the bottle over extended time.

There are 3 types of natural cork!


It is obtained from the bridge of the cortex in the oak’s thickness. When you’ll remove natural cork from a wine bottle, it will expand 85% of its original size almost instantly and 99% after 24 hours. It is ideal for long term wines.

There are two or more pieces of cork glued together. The cork comes from planks of low thickness which give the cork a high density. It’s usually made with cork scraps. This type of cork is used for larger bottles that don’t need aging.

In colmated cork imperfections are removed by glue that fills the holes. It presents a smooth and uniform surface. It’s used for medium aging still wines (max 3 years).

2.Synthetic cork

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Glass Bottle Cork

It has been adopted 40 years ago and wine industry allowed the using on a large scale. They are realized by thermoplastic polymers that ensure a perfect compression when the cork is inserted into the bottle. This type of cork is usually used with young wines (from 1 to 3 years).

Synthetic cork is sterile, therefore it can’t be attacked by molds. It’s possible to find this type of cork in different colors, this allows a customize packaging from the wineries.

There are some advantages: synthetic cork resists for a long time, it guarantees a perfect compression because it can be crafted, you can put the bottle in a vertical position because cork doesn’t need to be wet to preserve its integrity. On the other hand, according to some people, the negative aspect is that it adds a chemical smell to the wine.

3.Screw Cap

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For many years this cork has been associated to unrefined wines but nowadays there are a lot wineries that adopt this solution. It’s the most common in the New World Wine Regions, specially Australia and New Zealand, where tradition is not a limit. They have achieved great results about wine quality. This type of cork is suitable for medium and long term wines.

There is a waterproof coverage on the interior side as seal. The screw pitch avoids gas exchange, so screw cap seals better than natural cork and it’s less expensive.

4.Glass cork

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Finally there is the glass cork. It’s an innovation since the last years! With it you can open the bottle without corkscrew and you can open and close it every time you want. There is a small seal that guarantees a perfect closure of the bottle. A negative aspect is surely cost, the glass cork is too expensive.

Suitable for your glass bottle making expert—— Contact Us

4 Types of Glass Bottle Cork

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