Lyophilization demands a stopper that performs before, during, and after the freeze-dry cycle. Our 13mm rubber stoppers are engineered specifically for freeze-dry vials, with a slotted or two-leg design that allows moisture to escape during lyophilization while still forming a tight, sterile seal once the vial is fully seated.

Made from medical-grade butyl or halobutyl rubber compounds, these stoppers resist coring, maintain elasticity across temperature extremes, and meet the low extractables and leachables standards required for injectable and biologic products.

Available in gray or custom color, with or without coating (such as FluroTec or B2 coating) to reduce adhesion and improve machinability on high-speed filling lines.

For the visible, customer-facing side of the seal, we manufacture 20mm crimp flip-off caps with a raised, 3D convex logo embossed directly onto the flip-off top. This isn't a sticker or a printed mark - it's a stamped, three-dimensional impression built into the cap tooling itself.

Your logo, brand name, or custom wording stands up in relief and stays legible and tamper-evident for the life of the product, surviving autoclaving, cold-chain storage, and transit handling without fading, smudging, or peeling.

Raised (convex) or sunken (concave) relief, tooled to your exact brand mark.

Embossed words, letters, and brand names on the flip-off top.

Sized for standard injectable and steroid vial necks.

Aluminum-plastic construction suited for pharmaceutical and clinical use.

Custom color combinations for the aluminum shell and plastic button.

A raised logo that's easy to verify by touch and sight, hard to replicate.

Custom tooling for your specific logo, wordmark, or design - raised or sunken

Matched stopper and cap sets for 13mm freeze-dry vials and 20mm crimp vials

Medical-grade materials suitable for injectable and steroid vial applications

Sample proofs before full production runs

Competitive wholesale pricing for bulk and recurring orders

Consistent quality control across every embossing batch

Our 20mm custom logo cap seals are designed for the demands of steroid vial and injectable vial packaging, where a secure crimp, a clean flip-off action, and clear tamper evidence are non-negotiable. The aluminum ring crimps firmly onto the vial neck for a dependable seal, while the plastic center flips off cleanly with one motion, leaving no residue and no sharp edges on the vial mouth. The raised logo doubles as a visual anti-counterfeiting feature, making it easy for pharmacists, distributors, and end users to confirm they're holding a genuine product.