37g 28-400 SpH PET Preform

What this packaging is

A 28-400 SpH neck finish and 37-gram shot weight define this PET preform, engineered specifically for blow-molded bottles in household and personal care production. The 28mm threaded neck supports a wide range of closure compatibility, giving brand teams flexibility across surface cleaners, dish soap, and wash formats. Made in the USA, this preform supports tighter supply chains and faster turnaround for domestic bottle manufacturers. At 37g, the material weight balances structural integrity with processing efficiency. Custom color is available for larger runs. A reliable, production-ready component for mass-market or specialty liquid product lines that need consistent, scalable PET bottle packaging.

Why brands choose this

• USA manufacturing keeps domestic supply chains tight: Produced in the USA, this preform reduces lead time exposure and simplifies logistics for domestic bottle manufacturers and brand teams running high-volume household or personal care lines.
• 28-400 SpH neck finish opens up closure flexibility: The standardized 28-400 SpH thread finish is widely compatible across pump, trigger, and screw-cap closure systems, giving brand teams room to develop or adapt packaging without retooling the preform spec.
• 37g shot weight hits the sweet spot for high-volume liquid formats: At 37 grams, this preform is calibrated for the bottle weights typical in surface cleaner, dish soap, and wash packaging, balancing wall strength against material use in a category where cost efficiency at scale matters.