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GL18 White Tamper-Evident Closure with Integrated Dispensing Plug

Name: GL18 White Tamper-Evident Closure with Integrated Dispensing Plug - BlueSky Solutions
SKU: GL18TEW-IDP

GL18 white tamper-evident closure with integrated dispensing plug, PEHD/PELD. Fits all GL18 bottles 5ml–100ml. Controlled flow dispensing. Ideal for retail essential oils and household liquids.

MOQ and lead time applies – Please contact us for further details

The GL18 White Tamper-Evident Closure with Integrated Dispensing Plug (GL18TEW-IDP) combines first-open tamper evidence with a flow-control dispensing plug in a single GL18 cap assembly, manufactured in PEHD and PELD. The integral tamper-evident ring — moulded as part of the PEHD cap body — provides visible first-open evidence confirming the product has not been accessed prior to purchase, while the PELD dispensing plug sits within the cap and works in combination with it to restrict the bottle opening and deliver a controlled, metered flow of liquid when the bottle is tilted. This makes the GL18TEW-IDP the appropriate closure for retail products where the user dispenses by pouring or flowing rather than counting individual drops, and where tamper evidence is a standard retail expectation — including essential oils, concentrated aromatherapy preparations, household liquid products, and personal care formulations where a flow-restricting insert is commercially preferable to an unrestricted open neck.

This closure occupies a well-defined position in the GL18 system: it provides more consumer assurance than the standard dispensing plug closure (GL18W-IDP, which has no tamper evidence) while stopping short of the child-resistant access restriction of the CRC dispensing plug (GL18CRCW-IDP). It is the appropriate specification for retail personal care, cosmetic, and consumer household products sold through beauty retail, pharmacy, health stores, and e-commerce channels where consumers expect visible evidence that the product is sealed and untampered at point of purchase, and where a controlled pour or stream is the most appropriate dispensing format for the formulation and end-user experience. As part of the GL18 system (also known as NW18 or DIN168), the GL18TEW-IDP is fully interchangeable across all GL18 glass dropper bottles in the BlueSky range — 5ml to 100ml, in both amber and clear glass. Contact BlueSky to confirm stock availability, MOQ, and TE ring type before specifying.

Additional information

Material	PEHD/PELD
Neck size	GL18

Integral Tamper-Evident Ring — Retail Consumer Assurance

The tamper-evident ring is moulded as an integral part of the PEHD cap body, with TE bridges providing visible evidence of first opening. When the cap is opened for the first time the bridges break and the ring remains on the bottle neck, giving consumers immediate confirmation that the product has not been accessed prior to purchase. For retail essential oils, concentrated household liquids, and consumer wellness products sold through retail channels, tamper evidence is a standard commercial expectation supporting brand credibility and consumer confidence at point of purchase. Please contact BlueSky’s team to confirm the specific TE ring type for this closure before specifying.

Integrated Dispensing Plug — Controlled Flow, Not Drop-by-Drop

The PELD dispensing plug sits within the cap body and works in combination with it, restricting the bottle opening to deliver a metered, controlled flow of liquid when the bottle is tilted — rather than producing individual drops as a dropper insert would. This makes it the appropriate format for applications where the user pours or dispenses in a controlled stream, and where an unrestricted open neck would result in excessive or uncontrolled liquid release. The plug and cap are applied and removed together as a single integrated assembly.

Cap and Plug — Single Integrated Assembly

The dispensing plug and tamper-evident cap function as a combined assembly — the plug sits within the cap body and is not a standalone insert. This means the flow-control, tamper-evidence, and sealing functions are all integrated into a single component that is applied and removed as one piece, simplifying the filling and capping process and reducing the risk of component separation or misassembly during production or consumer use.

PEHD/PELD Two-Material Construction

The cap body is manufactured in PEHD (high-density polyethylene), providing structural rigidity, chemical resistance, and the integral TE ring mechanism. The dispensing plug insert is manufactured in PELD (low-density polyethylene), which provides the flexibility required for the plug to function correctly as a flow-control device. Both materials offer broad compatibility with cosmetic, personal care, and household liquid formulations. Formulation compatibility testing is recommended prior to production, particularly for high-concentration essential oils, solvents, or chemically aggressive formulations.

Tamper Evidence Without Child Resistance — Retail Product Positioning

The GL18TEW-IDP provides first-open tamper evidence combined with controlled flow dispensing — without a child-resistant opening mechanism. This positions it correctly for retail personal care, cosmetic, and household consumer products where tamper evidence is commercially expected but child-resistant packaging is not a mandatory requirement. For products where child access to the liquid contents presents a safety risk — such as concentrated essential oils or hazardous household formulations in homes with young children — the GL18CRCW-IDP, which adds a child-resistant mechanism to the same dispensing plug configuration, is the more appropriate specification.

Universal GL18 Compatibility — 5ml to 100ml

The GL18TEW-IDP is compatible with all GL18 glass dropper bottles in the BlueSky range — 5ml, 10ml, 15ml, 20mm, 30ml, 50ml, and 100ml — in both amber and clear glass. The GL18 neck standard maintains a consistent inner bore diameter of 10.65mm ± 0.15mm across all bottle volumes, meaning this closure specification does not change when bottle size changes within the range. For light-sensitive formulations, amber glass provides UV protection that preserves formulation integrity over the product’s shelf life.

Essential oils and concentrated aromatherapy blends
Household cleaning concentrates
Topical personal care
Consumer wellness liquids
CBD and botanical oil preparations
Topical antiseptics and wound care
Oral liquid products

Delivery & Returns

Orders for products in our ‘In Stock’ ranges will normally be delivered within two working days. Our product ranges labelled as ‘Product MOQ Applicable’ may be subject to a lead time which will be confirmed to you when we receive your order. For information relating to delivery charges, please refer to the ‘Is there a carriage charge?’ section in our FAQs page.

In some instances, goods can be returned. Please view our full refunds policy in our terms and conditions here: Terms & Conditions.

Core Product Range

We endeavour to hold continuous stock of this product. We expect to stock these ranges for a significant period of time in the future. This ensures you can build ranges around them and rely on their availability both now and in the coming years.

In Stock

We hold these products in our UK warehouses for you and they are available for rapid delivery.

Product MOQ Applicable

These products are not currently available from our UK held stock. However, we can supply you from our flexible and solid, global supply chain. Please note that there are minimum order quantities (MOQs) associated with this product, and lead times may vary depending on the quantity ordered. For more information on MOQs and lead times, please contact: sales@blueskysolutionsuk.com

Additionally, we can create bespoke products for you whether through colour, decoration, or bespoke tooling - to your specification. Our team of product experts will work with you to understand your requirements and place the necessary orders.

Frequently Asked
Questions

How does the dispensing plug work with the tamper-evident cap?

The dispensing plug is an integrated insert that sits within the tamper-evident cap body — the two components work together as a single assembly. On first use, opening the cap breaks the tamper-evident bridges, confirming the product has not been accessed previously. Once opened, tilting the bottle causes liquid to flow through the plug in a controlled stream rather than an unrestricted pour. The cap and plug are applied and removed together as one piece during filling, capping, and consumer use.

What is the difference between this closure and the GL18TEW-IRD?

Both closures combine a tamper-evident cap with a dispensing insert, but the insert type differs. The GL18TEW-IRD uses a rim dropper insert that delivers liquid drop by drop at 45° tilt — suited to applications where the user counts drops or applies liquid in a targeted manner. The GL18TEW-IDP uses a dispensing plug that delivers a controlled flow or stream when the bottle is tilted — suited to applications where the user pours a quantity of liquid rather than counting individual drops. Choose the dispensing plug where a metered pour is the most appropriate consumer dispensing experience.

What is the difference between this closure and the standard GL18W-IDP?

Both closures incorporate a dispensing plug delivering controlled flow, but the GL18TEW-IDP adds an integral tamper-evident ring providing visible first-open evidence. The GL18W-IDP is appropriate for professional, trade, or non-retail applications where tamper evidence is not a consumer-facing requirement. The GL18TEW-IDP is the correct specification for retail products where consumers expect visible confirmation that the product is sealed and untampered at point of purchase.

When should I choose this closure over the CRC dispensing plug?

The GL18TEW-IDP is appropriate where tamper evidence and controlled flow dispensing are required but child-resistant packaging is not mandated. The GL18CRCW-IDP adds a child-resistant opening mechanism for products where child access to the liquid contents presents a safety risk. If you are unsure which specification applies to your product, your regulatory advisor can confirm the applicable packaging requirements for your category and market, and BlueSky’s team can advise on the most appropriate closure specification.

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GL18 White Tamper-Evident Closure with Integrated Dispensing Plug

Additional information

Integral Tamper-Evident Ring — Retail Consumer Assurance

Integrated Dispensing Plug — Controlled Flow, Not Drop-by-Drop

Cap and Plug — Single Integrated Assembly

PEHD/PELD Two-Material Construction

Tamper Evidence Without Child Resistance — Retail Product Positioning

Universal GL18 Compatibility — 5ml to 100ml

Delivery & Returns

Frequently Asked
Questions

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GL18 White Tamper-Evident Closure with Integrated Dispensing Plug

Additional information

Integral Tamper-Evident Ring — Retail Consumer Assurance

Integrated Dispensing Plug — Controlled Flow, Not Drop-by-Drop

Cap and Plug — Single Integrated Assembly

PEHD/PELD Two-Material Construction

Tamper Evidence Without Child Resistance — Retail Product Positioning

Universal GL18 Compatibility — 5ml to 100ml

Delivery & Returns

Frequently Asked Questions

Ready to discuss this product?

What our customers say

Download our

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Frequently Asked
Questions

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