{"id":5984,"date":"2026-08-13T09:41:00","date_gmt":"2026-08-13T13:41:00","guid":{"rendered":"https:\/\/jbtopglass.com\/?p=5984"},"modified":"2026-08-12T02:37:06","modified_gmt":"2026-08-12T06:37:06","slug":"wine-capsule-holes-on-top","status":"publish","type":"post","link":"https:\/\/jbtopglass.com\/es\/conocimiento\/wine-capsule-holes-on-top\/","title":{"rendered":"\u00bfPor qu\u00e9 las c\u00e1psulas de las botellas de vino tienen dos agujeros en la parte superior?"},"content":{"rendered":"\n
\"Why<\/figure>\n\n\n\r\n
<\/div>\n\n\n

Wine capsule holes are the tiny openings seen on top of many cork-finished wine bottles. They allow trapped air to escape while the capsule is fitted over the cork and bottle neck. This helps the capsule move into position and sit more evenly on the bottle.<\/p>\n\n\n\n

Many wine capsules have two holes, but two is not a fixed industry requirement. A capsule may have one hole, several holes or no visible holes. The design depends on the capsule material, dimensions, top construction and application equipment. These holes do not pass through the cork. They are part of the outer capsule and do not make the wine breathe.<\/p>\n\n\n\n

\"wine<\/figure>\n\n\n\n

What Are the Small Holes in Wine Bottle Foil?<\/h2>\n\n\n\n

The cover over the cork and upper bottle neck is usually called a wine capsule. Many people still call it foil, although modern capsules may be made from tin, aluminum-based laminate or heat-shrink plastic.<\/p>\n\n\n\n

If you want to learn more about the complete covering rather than only the holes, read our guide to why wine bottles have foil<\/a>.<\/p>\n\n\n\n

The holes are normally made in the top disc of the capsule. They often look like tiny pin marks near the edge. They are much smaller than the perforations or tear strips used to open some capsules.<\/p>\n\n\n\n

These small openings are commonly called vent holes. Suntory\u2019s wine packaging FAQ<\/a> explains that they provide an escape route for air when the capsule is placed on the bottle. Without that route, trapped air can make smooth application more difficult.<\/p>\n\n\n\n

How Do Wine Capsule Holes Work?<\/h2>\n\n\n\n

The bottle is corked before the capsule is applied. A capsule is then placed over the top of the bottle and formed or shrunk around the neck. The exact process depends on the capsule material and the bottling equipment.<\/p>\n\n\n\n

As the capsule moves down, air can become trapped between its top and the bottle. Once the capsule begins to fit closely around the neck, that air needs somewhere to go. The small holes allow it to escape instead of remaining under the top disc.<\/p>\n\n\n\n

This can help the capsule sit fully on the bottle and reduce trapped air beneath the top. For heat-shrink capsules, the holes also provide an escape route while the material contracts. Sapporo\u2019s packaging FAQ<\/a> describes these small holes as vents used to release air during heat shrinking.<\/p>\n\n\n\n

The holes are useful, but they cannot correct every application problem. A capsule may still sit too high, wrinkle or move off-center if it is the wrong size, the cork is not inserted correctly, the bottle neck differs from the approved sample or the equipment settings are unsuitable.<\/p>\n\n\n\n

\"Wine<\/figure>\n\n\n\n

Do the Holes Let the Wine Breathe?<\/h2>\n\n\n\n

No. The vent holes do not create an open channel into the bottle. They end above the cork, while the cork remains inside the glass neck. The capsule sits outside the closure system.<\/p>\n\n\n\n

The holes are therefore not designed to control oxygen exposure or wine ageing. Those depend mainly on the selected closure, the bottle finish, the filling and closing process, and the storage conditions.<\/p>\n\n\n\n

A capsule with two holes does not make the cork more breathable. A capsule without visible holes does not prove that the wine is completely protected from oxygen.<\/p>\n\n\n\n

The same distinction applies to leakage. The capsule is not the part that seals the liquid inside the bottle. The cork, synthetic stopper or screw cap must match the bottle finish and be applied correctly. Our guide to glass bottle closures and caps<\/a> explains why the closure and bottle neck should be checked as one packaging system.<\/p>\n\n\n\n

The Sapporo packaging FAQ also states that the small capsule vents do not affect the quality of the wine. Their purpose is connected to capsule application, not wine ageing.<\/p>\n\n\n\n

\"Wine<\/figure>\n\n\n\n

Why Are There Usually Two Holes?<\/h2>\n\n\n\n

There is no universal wine packaging rule that says every capsule must have exactly two holes. A pair is simply a common design. Other capsules may use a different number or arrangement.<\/p>\n\n\n\n

The number alone does not tell you whether a capsule is good or bad. The supplier must consider the capsule material, top construction, hole size, hole position, capsule dimensions and intended application method.<\/p>\n\n\n\n

A design that works well on one bottling line may not be the best choice for another.<\/p>\n\n\n\n

The holes are not a code for the wine\u2019s quality, vintage, grape variety or country of origin. They also do not show how expensive the wine is. They are simply a small functional detail in the outer packaging.<\/p>\n\n\n\n

Do All Wine Capsules Need Vent Holes?<\/h2>\n\n\n\n

No. Some capsules use visible vent holes, while others can be applied successfully without them.<\/p>\n\n\n\n

This is why a capsule without holes is not automatically defective. A capsule with one, two or several holes is not necessarily damaged either. The approved specification, physical sample and bottling-line test are better references than the number of holes alone.<\/p>\n\n\n\n

Capsules should also be distinguished from other wine bottle finishes. Some corked bottles use wax or leave the upper neck uncovered. Screw-capped bottles use a closure that extends over the neck and normally do not need a separate capsule over a cork.<\/p>\n\n\n\n

What Should Wineries Check Before Ordering Capsules?<\/h2>\n\n\n\n

The bottle, cork, capsule and application equipment should be checked together. A capsule that looks correct in a drawing may behave differently when it is used on the real production bottle.<\/p>\n\n\n\n

Check the Bottle Neck and Cork Position<\/h3>\n\n\n\n

Confirm the outside diameter of the bottle finish, the lip profile, neck taper and required capsule height.<\/p>\n\n\n\n

The cork should also be inserted to a consistent depth. A cork that sits too high reduces the space beneath the capsule top and can affect how the capsule sits on the bottle.<\/p>\n\n\n\n

Confirm the Hole and Artwork Positions<\/h3>\n\n\n\n

If vent holes are required, confirm their number, size and position with the capsule supplier.<\/p>\n\n\n\n

Top printing, embossing or a centered emblem should be planned around the holes. A functional vent should not pass through an important part of the artwork by accident.<\/p>\n\n\n\n

Test the Complete Package on the Intended Line<\/h3>\n\n\n\n

Use production bottles, the intended cork and the selected capsule for the test. Run them on the actual spinner, roller or heat-shrink equipment at a representative production speed.<\/p>\n\n\n\n

Check whether the capsule moves fully into position, remains centered and forms smoothly around the bottle neck.<\/p>\n\n\n\n

If the result is uneven, review the bottle-neck dimensions, capsule size, cork position, vent specification and equipment settings together. Simply adding more holes may not solve the real problem.<\/p>\n\n\n\n

Frequently Asked Questions<\/h2>\n\n\n\n

Are the Two Holes a Sign That the Wine Has Been Opened?<\/h3>\n\n\n\n

No. Small, clean and evenly positioned holes may be part of the original capsule design.<\/p>\n\n\n\n

A cut capsule skirt, torn opening strip, displaced capsule or disturbed cork is more relevant when checking whether a bottle may have been opened.<\/p>\n\n\n\n

Can Wine Leak Through the Capsule Holes?<\/h3>\n\n\n\n

Wine should not reach the holes because the closure seals the bottle below them.<\/p>\n\n\n\n

Liquid around the top of a closed bottle may indicate seepage, incorrect cork insertion, closure damage or another packaging problem that needs inspection.<\/p>\n\n\n\n

Is a Wine Capsule Without Holes Defective?<\/h3>\n\n\n\n

Not by itself. Some capsule designs do not use visible vents.<\/p>\n\n\n\n

It becomes a problem when the delivered capsule does not match the approved specification or cannot be applied correctly on the intended bottle and equipment.<\/p>\n\n\n\n

Can Holes Be Added After the Capsules Are Made?<\/h3>\n\n\n\n

This should not be treated as an informal adjustment on the bottling line.<\/p>\n\n\n\n

Hole size and position affect the appearance of the capsule and may change how the material behaves. Any change should be agreed with the capsule supplier and tested on the intended equipment.<\/p>\n\n\n\n

Conclusion<\/h2>\n\n\n\n

Why do wine capsules have two holes on top? In most cases, they are vents that let trapped air escape while the capsule is fitted to the bottle.<\/p>\n\n\n\n

They can help the capsule sit correctly, but they do not pass through the cork, seal the wine or control how the wine ages.<\/p>\n\n\n\n

Two holes are common, not compulsory. The correct capsule design is the one that matches the production bottle, cork, artwork and application line.<\/p>\n\n\n\n

Jingbo Group manufactures glass wine bottles<\/a> with cork and screw-cap finishes for commercial packaging projects. We can review the bottle neck, intended closure and capsule requirements together before production. Contact our team<\/a> to discuss an existing bottle or a custom wine bottle project.<\/p>\n","protected":false},"excerpt":{"rendered":"

Wine capsule holes are tiny vents that release trapped air during application. They do not pass through the cork or make the wine breathe.<\/p>","protected":false},"author":1,"featured_media":5986,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[182,190],"class_list":["post-5984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-wine-bottle-capsule","tag-wine-foil-holes"],"acf":[],"_links":{"self":[{"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/posts\/5984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/comments?post=5984"}],"version-history":[{"count":2,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/posts\/5984\/revisions"}],"predecessor-version":[{"id":5990,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/posts\/5984\/revisions\/5990"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/media\/5986"}],"wp:attachment":[{"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/media?parent=5984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/categories?post=5984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jbtopglass.com\/es\/wp-json\/wp\/v2\/tags?post=5984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}