Bottle Adaptors 18mm,20mm,24mm,28mm
An Orifice Reducer is a plastic insert designed to fit securely into the neck of a bottle, reducing the opening diameter and enabling controlled dispensing of liquid products.
It helps regulate liquid flow, improve dosing accuracy, minimize spills, and enhance user convenience.
Orifice reducers are widely used in essential oil packaging, pharmaceutical packaging, cosmetic products, aromatherapy solutions, and specialty chemical containers.
Product Description
Suncity is a leading supplier (factory, manufacturer, exporter) of PE Orifice reducers or Press-in Bottle Adaptors from Zhejiang, China.
- Orifice reducers, Press-in Bottle Adaptors
- Bottle neck 18mm, 20mm, 24m, 28mm,
- With lid or without lid,
- PE
PE orifice reducers or Press-in Bottle Adaptors reduce the bottle opening size, so your product will come out more smoothly. Provides a consistent flow and even stream. Popular available for shampoo, lotions, and oil bottles.
Key Features & Advantages
Controlled Dispensing
The small dispensing orifice allows liquids to be released in a controlled manner.
Benefits
- Precise dosage
- Improved product control
- Consistent dispensing
- Reduced overuse
Spill Prevention
The reducer limits excessive liquid flow.
Benefits
- Less mess
- Reduced leakage
- Improved user experience
- Safer transportation
Product Preservation
By minimizing air exposure, the insert helps preserve sensitive formulations.
Suitable For
- Essential oils
- Aromatherapy products
- Herbal extracts
- Pharmaceutical liquids
Cost-Effective Solution
A simple insert can transform a standard bottle into a precision dispensing package.
Benefits
- Low production cost
- Easy installation
- Suitable for automated assembly
Available Materials
LDPE (Low Density Polyethylene)
Most common material.
Advantages
- Flexible
- Easy insertion
- Chemical resistant
- Economical
HDPE (High Density Polyethylene)
Advantages
- Strong structure
- Excellent durability
- Impact resistant
PP (Polypropylene)
Advantages
- Heat resistant
- Chemical resistant
- High dimensional stability
Common Applications
Essential Oil Packaging
Largest application sector.
Used for:
- Lavender oil
- Tea tree oil
- Peppermint oil
- Aromatherapy blends
Industry term:
Euro Dropper Insert
Pharmaceutical Packaging
Used for:
- Oral liquids
- Herbal extracts
- Veterinary products
- Homeopathic solutions
Cosmetic Packaging
Suitable for:
- Serums
- Facial oils
- Hair treatments
- Beauty concentrates
Chemical Packaging
Used for:
- Laboratory reagents
- Cleaning concentrates
- Industrial additives
Orifice Size Options
Different dispensing hole diameters are available depending on viscosity.
| Orifice Diameter | Suitable Products |
| 0.5 mm | Essential oils |
| 1.0 mm | Serums |
| 1.5 mm | Herbal extracts |
| 2.0 mm | Medium viscosity liquids |
| 3.0 mm | Thick formulations |
Neck Finish Compatibility
Common bottle neck sizes:
| Neck Size |
| 18 DIN |
| 20 DIN |
| 22 DIN |
| 24/410 |
| 28/410 |
Most essential oil packaging uses:
DIN18 Neck Finish
Color Options
Available in:
- Natural
- White
- Black
- Red
- Blue
- Green
Custom colors available.
Compatible Bottle Types
Glass Bottles
- Amber glass bottles
- Blue glass bottles
- Green glass bottles
- Flint glass bottles
Plastic Bottles
- HDPE bottles
- PET bottles
- LDPE bottles
OEM & ODM Services
Customization available for:
Insert Design
- Hole diameter
- Flow rate
- Neck compatibility
Material
- LDPE
- HDPE
- PP
Appearance
- Color matching
- Logo customization
- Special tooling development
Product Specification Example
DIN18 LDPE Orifice Reducer
Material: LDPE
Color: Natural
Neck Finish: DIN18
Orifice Diameter: 7.0 mm
Application: Essential oils
Feature: Controlled dispensing
Compatibility: Glass and plastic bottles
Product History
The orifice reducer was developed alongside the rapid growth of the pharmaceutical and essential oil industries during the mid-20th century.
As manufacturers sought more reliable methods for dispensing concentrated liquids, packaging engineers introduced insert systems that could precisely regulate liquid flow without requiring pumps or droppers.
The rise of aromatherapy and essential oils in Europe led to the widespread adoption of the Euro Dropper System, which combines:
- Glass bottle
- Orifice reducer
- Screw cap
This packaging configuration remains one of the most popular solutions for essential oil products worldwide.
| Keyword | Popularity |
| Orifice Reducer | ★★★★★ |
| Euro Dropper Insert | ★★★★★ |
| Dropper Insert | ★★★★ |
| Flow Restrictor Insert | ★★★★ |
| Dispensing Insert | ★★★ |
| Bottle Adaptor | ★★ |