Calaso Smooth 18-400 Straight Sided Tall Threaded Closure

What this packaging is

An MOQ of just 1 unit makes this closure one of the most accessible components on the market — a rare find for indie brands, sampling programs, or limited-edition launches. The Smooth 18-400 Straight Sided Tall Threaded Closure is a glossy PP cap with a clean flat top and straight-sided tall profile, engineered to the standard 18/400 neck finish for broad compatibility. Sourced through Calaso's European manufacturing network, it pairs cleanly with bottles across lip care, eye products, face moisturizers, body lotions, hair treatments, and even vitamin or supplement packaging. A versatile workhorse that keeps brand aesthetics polished without locking you into large commitments.

Why brands choose this

• Unmatched minimum order flexibility: With an MOQ of 1 unit, this closure removes the usual barrier to entry for small brands, product developers in testing phases, or anyone running a limited-edition program — you order exactly what you need, nothing more.
• 18/400 neck compatibility spans dozens of bottle formats: The 18/400 thread standard is one of the most widely used finishes in personal care and supplement packaging, meaning this closure integrates cleanly across a broad range of existing bottle tooling — from lip serums to vitamin dropper bottles — without custom fitment work.
• Glossy flat-top profile reads premium at shelf: The tall, straight-sided silhouette with a smooth glossy finish signals quality in categories like eye care and face moisturizers, where clean, clinical aesthetics drive consumer trust — and the white colorway works as a blank canvas for labels, screen printing, or hot stamping.

Finishes