Tamper-evident closure for glass and plastic bottles from Amcor

Last update on Jul 14, 2026

Packaging engineers selecting a tamper-evident closure for glass bottles weigh several requirements together. Consumer trust from tamper evidence, easy opening and reclosing for daily use, and reliable sealing under carbonation pressure for sparkling formats all have to be met at the same time. 

Amcor is now supplying its 28mm Flat Cap for Glass Tamper Evident, developed specifically for glass bottles, to Belgian mineral water brand Ginstberg. The case shows how those requirements play out on a live bottling line. Europe is expanding Deposit Return Schemes and tightening rules on refillable and reusable packaging, adding a documented, traceable supply chain for recycled content to the specification.

Combines protection, security and ease of use

Amcor's 28mm Flat Cap for Glass Tamper Evident is a two-piece closure developed specifically for glass bottles. It combines product protection and tamper evidence with a design intended to stay easy to open and reclose for the end consumer.

 

Formulators and packaging engineers evaluating closures for bottles can review 1000+ grades for caps & closures from suppliers across the industry for direct comparison in the Master Catalog of Plastics.

 ISCC+ certification brings recycled-content traceability

The closure uses a patented lightweight two-piece construction. It is engineered for both still and sparkling beverages and supports carbonation levels up to 4.3 vol, covering the range used in sparkling mineral water. It is also available with ISCC+ certification, providing traceability of recycled content through mass-balance chain of custody, relevant for brands that need to document recycled content sourcing rather than simply claim it. In practical terms: a closure rated for sparkling formats up to 4.3 vol, with recycled-content traceability built in rather than added on.

 

Packaging engineers comparing certified recycled-content options can check grades from top suppliers directly in Master Catalog of Plastics.

Refillable-ready range for reusable systems

The 28mm Flat Cap for Glass TE is part of Amcor's wider closures range for still and sparkling products across glass and plastic bottles of different sizes. As Deposit Return Schemes expand and refillable and reusable packaging legislation tightens across Europe, closures that perform reliably across repeated reuse cycles move from optional to a specification requirement. Amcor positions this closure alongside its 28mm PolyVent® and 28mm PolyGuard® models as a refillable-ready range already proven on reusable bottle systems for glass and PET bottles.

 

According to Uli Kolbert, product line manager – beverage closures & home care triggers, Amcor Global Rigid Packaging Solutions, "The closure is the consumer's first interaction with the packaging and therefore has a very important role to play in delivering consumer acceptance and brand loyalty. Our refillable ready range is designed to meet the needs of both glass and PET bottles, ensuring brands can adapt to evolving regulation across Europe."

 

Belgian mineral water brand Ginstberg, bottled at the source in the Flemish Ardennes and marketed as nitrate-free and free of additives, selected the 28mm Flat Cap for Glass TE for its glass bottles. According to Evi Van De Velde, COO, Ginstberg, "Consumer experience of our brand begins with the packaging, so it is essential that the closure is durable and reliable and easy to open and reclose, as well as offering the reassurance of tamper evidence. The Amcor closure has both the necessary technical and aesthetic attributes."

 

For packaging engineers and formulators evaluating tamper-evident, refillable-ready closures for glass and PET bottles, SpecialChem's platform gives direct access to an extensive range of grades for closures in a single click. Sign up for SpecialChem's newsletter to keep track of new packaging technologies as they reach the market.

Source
Amcor