Smooth 33-400 PP Flip Top Cap

What this packaging is

A built-in liquid trap sets this cap apart — it captures residual product inside the container instead of letting it collect under the cap, keeping dispensing clean and controlled. The Smooth 33-400 PP Flip Top Cap from MRP Solutions is a polypropylene closure with a 180° single-flap opening and a 6.35mm orifice sized for viscous-to-liquid flow. The 33mm diameter and 400 neck finish make it broadly compatible across condiment, personal care, and household cleaner bottle formats. Made in the USA for reliable lead times, it's available in 12 standard colors with digital and offset print compatibility — giving emerging and established brands alike a clean, brandable finish across product lines.

Why brands choose this

• Liquid trap design reduces mess at point of use: The built-in liquid trap retains residual product inside the container rather than pooling under the cap — a functional detail that directly improves the consumer experience with condiments, lotions, and cleaners, and one that's increasingly expected as brands compete on perceived quality and finish.
• Cross-category range in one closure: The 33-400 neck finish covers a wide sweep of bottle formats used across specialty food, surface cleaners, shampoos, body lotions, and face moisturizers — which means brand teams developing multiple SKUs or ranging across categories can standardize on a single closure component and simplify procurement.
• USA manufacturing with PCR material availability: Made domestically, which shortens lead times and reduces import complexity for US-based brands. For brands with sustainability commitments, this cap is available with PCR content incorporated into the PP construction — giving product developers a path toward lower-virgin-material packaging without changing the component format.