Question 1

How do I choose the right closure for my bottle?

Accepted Answer

Start with your bottle's neck finish. The closure must match both the diameter and thread style exactly. Then consider how the customer uses the product. Flip top caps suit rinse-off products like shampoo and body wash. Disc top caps give controlled one-handed dispensing for leave-on skincare. Trigger sprayers and mini trigger sprayers work for household cleaners and personal mists. Pumps including foaming pumps are right for lotions, hand soap, and body care. Ribbed and smooth lids are the correct choice for powders, scrubs, and anything dispensed by scoop or pour. Confirm the closure liner is chemically compatible with your formula before ordering.

Question 2

What are cap liners and how do pump specs work?

Accepted Answer

Cap liners sit inside the closure and seal the bottle rim. PS (pressure sensitive) liners seal on contact when the cap is tightened and require no equipment, suited for most personal care and cleaning products. HIS (heat induction seal) liners bond permanently to the bottle rim using an induction sealer, creating a tamper-evident seal required for supplements, vitamins, and OTC products. Universal liners work across a wider range of bottle materials and neck finishes, practical for brands running multiple SKUs. For pumps, the key specs are output per stroke and dip tube length. Very low output (0.1cc to 0.4cc) suits eye treatments and precision actives. Low output (0.5cc to 1cc) covers serums and treatment oils. Medium output (1cc to 2cc) works for daily moisturizers and hand lotions. High output (2cc to 4cc) is right for body wash and shampoo. Foaming pumps run at 0.8cc to 1.2cc liquid output. Propacks mini trigger sprayers deliver 0.25cc to 0.3cc per pull for facial mists and leave-in hair treatments.

Question 3

What is a bottle neck finish?

Accepted Answer

A neck finish is the threaded opening at the top of a bottle that determines which cap or closure fits. It is described by two numbers: the first is the diameter in millimeters, the second is the thread style. A 28-410 finish has a 28mm opening with a 410-style thread. Common neck finishes at Propacks include 20-410, 24-410, 28-400, and 38-400. The wrong neck finish means the cap will not seal correctly. Match both numbers before ordering.

Question 4

What is PCR packaging?

Accepted Answer

PCR packaging is made from post-consumer recycled plastic: material collected from households and businesses after use, processed back into resin, and formed into new bottles and closures. It uses significantly less energy to produce than virgin plastic and reduces the volume of plastic sent to landfill. Propacks bottles and closures are available in rPET and rHDPE to support California SB 54 compliance and your brand sustainability commitments.

Question 5

How do I recycle plastic bottles in California?

Accepted Answer

Plastic bottles marked with resin codes 1 (PET) and 2 (HDPE) are accepted at curbside recycling programs in most California cities. Bottles with a CRV label can be returned to any certified buyback center for a cash refund. Drop-off centers operated by CalRecycle accept a broader range of plastics. Rinse containers before recycling and leave caps on PET bottles. PCR bottles are recycled the same way as virgin plastic bottles.

Black PP Smooth Flip Top Cap
with 20-410 neck finish and Pressure Sensitive Seal

Variants

PCR Content

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Color

Neck Finish

Pricing

Quantity

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Pair with a Bottle

Pair with a Bottle

Variants

PCR Content

Variant

Color

Neck Finish

Pricing

Quantity

Black PP Smooth Flip Top Capwith 20-410 neck finish and Pressure Sensitive Seal

Variants

PCR Content

Variant

Color

Neck Finish

Pricing

Quantity

Variants

Pricing

Quantity

+–Description

+–Specifications

+–Frequently Asked Questions

+–Helpful Resources

+–Description

+–Specifications

+–Frequently Asked Questions

+–Helpful Resources

Pair with a Bottle

+–Description

+–Specifications

+–Frequently Asked Questions

+–Helpful Resources

Pair with a Bottle

Variants

PCR Content

Variant

Color

Neck Finish

Pricing

Quantity

Black PP Smooth Flip Top Cap
with 20-410 neck finish and Pressure Sensitive Seal