28-400 Smooth Child-Resistant Concentrate Jar Lids – Foil Liner

Designed for standard 28-400 neck finishes, these smooth child-resistant lids are built for cannabis concentrate packaging workflows. Push-down & turn mechanism. Foil liner included. Available in matte black or matte white. Sold by the case.

Compatible with Goodlook® Mini and other 28-400 concentrate jars.

Why Child-Resistant Packaging is Essential

IThe 28-400 format is the industry-standard closure for 3ml, and 5ml concentrate jars. These smooth 28mm child-resistant lids are designed to match that footprint precisely — ensuring consistent sealing, reliable torque, and compatibility with production-scale filling operations. Built for concentrate packaging systems that require a larger diameter closure.

Push-Down & Turn Child-Resistant Closure

These 38-400 lids use the same standard push-down-and-turn child-resistant mechanism widely adopted in concentrate packaging systems. The dual-action motion requires downward pressure while turning, reducing unintended access while remaining practical for adult consumers. The closure is engineered for consistent performance across repeated use cycles. This 28mm child-resistant closure falls under the Multiple Use "Lifetime CRP" category, meaning it maintains its child-resistance capabilities throughout the life of the products use. (When used Correctly)

Compatibility Designed For 28-400 Neck Finishes

These lids are designed to fit standard 28-400 neck finishes, including the Goodlook® Mini (3ml / 5ml-compatible) and other concentrate jars using the same thread pattern. As with all packaging components, torque and compatibility testing should be verified before full production runs to ensure optimal performance within your specific packaging system.

Liner and Material Benefits

Each lid includes a foil liner that supports a reliable seal while helping preserve product freshness. The liner also improves non-stick performance, which is especially important for sticky concentrates such as rosin, live resin, wax, and hash. By reducing material adhesion inside the cap, it helps minimize product loss and improves overall user experience.

Manufactured from high-quality polypropylene (PP), these closures offer durability, lightweight handling, and chemical resistance suited for cannabis packaging environments. Polypropylene is widely used in concentrate closures due to its stability and consistent performance in production workflows.

Easy Customization for Your Brand

Unlike many child-resistant caps that include molded instructions or textured ridges, these lids feature a smooth matte surface. This clean finish creates a more refined aesthetic while providing a better surface for lid-top labels and tamper-evident seals. The smooth design also supports custom branding programs and helps maintain a consistent retail presentation. Customization is key to standing out in the competitive cannabis market, which is why we provide dieline templates and labeling guides to make branding these closures as seamless as possible.