38-400 Smooth Child-Resistant Concentrate Jar Lids – Foil Liner

38-400 smooth child-resistant concentrate jar lids designed for standard 38-400 neck finishes and commercial concentrate-packaging workflows. Each closure uses a push-down-and-turn mechanism, includes a foil liner, and is available in matte black or matte white.

Compatible with the Goodlook® Classic 8ml glass concentrate jar and other jars using a compatible 38-400 neck finish. Sold by the case for production-volume packaging.

38-400 Concentrate Jar Lid Specifications

Designed for 38-400 Concentrate Jars

The 38-400 neck finish is commonly used on larger glass concentrate jars, including many 7ml, 8ml, and 9ml-style packaging formats.

These lids are designed to match compatible 38-400 threads and pair directly with the Goodlook® Classic. Because dimensions and manufacturing tolerances can vary between packaging suppliers, brands using third-party jars should verify thread fit, applied torque, liner contact, and overall package performance before moving into full production.

Push-Down-and-Turn Child-Resistant Closure

The closure uses a push-down-and-turn mechanism that requires downward pressure while rotating the lid to open. This style of closure is commonly used in child-resistant packaging systems where access requires two simultaneous motions.

Child-resistant requirements apply to the complete finished package and can vary by product, jurisdiction, and package configuration. Brands should verify that their complete jar-and-closure system meets the requirements applicable to their specific market.

Compatibility with Goodlook® Classic

These 38-400 lids are the corresponding closure size for the Goodlook® Classic 8ml concentrate jar.

The Classic was designed around common 7ml and 9ml-style concentrate packaging footprints while using an 8ml internal capacity and standard 38-400 neck finish. Together, the jar and lid create the primary container foundation for a coordinated concentrate-packaging system.

View both closure sizes on our child-resistant concentrate jar lids page.

Foil Liner Included

Each 38-400 closure includes a foil liner that creates the contact surface between the lid and jar opening. The liner is intended to support the sealing needs of concentrate-packaging applications while separating the packaged product from the interior of the closure.

Concentrate formulations and storage requirements vary, so brands should evaluate the complete jar, liner, closure, and product combination under their intended filling, storage, transportation, and shelf-life conditions.

Polypropylene Construction

The closures are manufactured from polypropylene (PP), a lightweight and durable material commonly used for packaging closures. PP offers consistent molding characteristics and is well suited to repeated opening and closing in commercial packaging applications.

Smooth Matte Finish for Labels & Branding

Unlike ribbed or heavily textured closures, these lids feature a smooth matte surface across the top and sides. The clean finish provides usable surface area for branding and package identification while maintaining a simple retail presentation.

The smooth closure can be incorporated into packaging configurations using:

• Top-applied lid labels
• Sidewall labels
• Tamper-evident label configurations
• Applicable custom-decoration methods

Makerbaus also offers custom concentrate labels and custom concentrate boxes for building a coordinated packaging system around the jar and closure.

Bulk 38-400 Concentrate Jar Lids

These closures are stocked for commercial packaging workflows and sold by the case. Select matte black or matte white and pair them with the Goodlook® Classic or another verified 38-400 jar.

For complete jar options, browse our wholesale glass concentrate jars.