Liquid Silicone Rubber Injection MoldingPublished on May 8, 2026
Made of food-grade liquid silicone rubber through injection molding, safe and odorless, soft, bite-resistant and not easy to deform. The breast-like design reduces baby's resistance, built-in anti-colic valve reduces choking risk, fits most wide-caliber baby bottles, high temperature resistant for repeated steam disinfection.
Material
Food-grade LSR
Hardness
Shore A 30-40
Temperature
-40°C ~ +200°C
Colors
Transparent, White, Customizable
Certifications
ISO 9001FDAGB 4806.2LFGB etc.
Applications
Suitable for most brands of wide-caliber baby bottlesfor daily feeding of babies aged 0-3 years with different monthscan be matched with newborn bottlesmilk storage bottles and sippy cups.
Relevant Certification StandardsGB 4806.2, GB 4806.10, FDA 21 CFR 177.2600, EU EN 14350
Product Overview
The Food Grade Liquid Silicone Anti-colic Nipple Wide Caliber Universal Baby Nipple is a premium infant feeding accessory engineered to mimic the natural feel, elasticity, and latching experience of breastfeeding, while eliminating common feeding discomforts such as colic, gas, and nipple confusion. Manufactured from medical and food-grade liquid silicone rubber (LSR) via precision injection molding, this product is free of BPA, phthalates, PVC, and harmful chemical additives, making it safe for newborns and infants aged 0 to 36 months.
Its core design features a wide, soft breast-like base that supports natural lip and jaw positioning during latching, paired with an integrated anti-colic air vent system that equalizes internal bottle pressure during feeding, preventing air ingestion that leads to spit-ups, abdominal pain, and gassiness. The universal wide-caliber interface is compatible with 95% of mainstream wide-neck baby bottles on the market, eliminating the need for brand-specific replacement parts and reducing caregiver hassle. The nipple’s textured surface and variable flow rate design adapt to growing infants’ sucking strength, supporting seamless transition between breastfeeding and bottle feeding for both nursing parents and formula-fed babies.
Technical Specifications
Material Properties
All components of the nipple are manufactured from high-purity food-grade liquid silicone rubber that meets global safety standards, with the following material characteristics:
ParameterValueCompliance Standard
Silicone Purity≥99.9%FDA 21 CFR 177.2600, EU 10/2011
Shore Hardness35±5 A (soft newborn variant) / 45±5 A (active infant variant)ISO 868
Temperature Resistance-60°C to 200°C (-76°F to 392°F)GB 4806.2-2015 (China Food Contact Standard)
Extractable Heavy Metals<0.1ppm (lead, cadmium, mercury)EN 14350-1:2020 (Child Use and Care Articles Standard)
Volatile Compounds≤0.1%ISO 771
BiocompatibilityNon-irritating to oral mucosa, no cytotoxicityISO 10993-5
Physical Performance
The nipple is designed for long-term durability and functional reliability under daily use conditions:
ParameterValueTest Method
Tensile Strength≥7.5 MPaISO 37
Elongation at Break≥550%ISO 37
Tear Resistance≥30 N/mmISO 34-1
Compression Set (25°C, 72h)≤10%ISO 815
Flow Rate (30° tilt, full bottle, 24°C)Slow flow: 1-3 mL/min; Medium flow: 4-6 mL/min; Fast flow: 7-10 mL/min; Y-cut: 12+ mL/minInternal feeding simulation test
Fatigue Resistance≥10,000 sucking cycles without deformation or crackingAutomated sucking simulation test
Anti-colic Vent Efficiency≥92% reduction in air ingestion compared to non-vented nipplesThird-party pediatric gastroenterology lab test
Process Parameters
Manufactured under Class 100,000 cleanroom conditions to ensure product safety and consistency:
Process StepParameter
Injection Molding Temperature170°C to 190°C
Curing Time80s at 185°C
Post-curing Treatment2h at 200°C to remove residual volatile compounds
Sterilization Method (post-production)Gamma irradiation (25 kGy dose, no residual radiation)
Edge Trimming Precision±0.02mm to avoid sharp edges and burrs
Product Advantages
1. Superior Anti-colic Performance for Reduced Feeding Discomfort
The nipple’s built-in one-way air vent is positioned at the base of the nipple, away from the infant’s mouth, to draw external air into the bottle during feeding without mixing with the milk/formula. This eliminates the negative pressure buildup that causes infants to suck in air along with milk, reducing colic episodes by up to 82% according to independent clinical trials with 200+ infants aged 0-6 months. The vent design also prevents milk leakage, even when the bottle is inverted, reducing mess during on-the-go feeding.
2. Breast-like Design Minimizes Nipple Confusion
The 6cm wide, ultra-soft silicone base mimics the shape and elasticity of a human breast areola, allowing infants to latch on naturally and exercise the same oral motor skills used during breastfeeding. The 35A Shore hardness variant for newborns has a stretch rate of up to 10mm under sucking pressure, matching the extensibility of human nipple tissue, making it ideal for mixed feeding regimens where infants alternate between breast and bottle.
3. Durable, Long-lasting and Easy to Maintain
The high-tensile LSR material resists cracking, tearing, and discoloration even after repeated exposure to high-temperature sterilization (boiling, steam sterilizer, microwave sterilizer, or dishwasher top rack). Unlike latex or thermoplastic elastomer (TPE) nipples, it does not absorb odors, stains, or food residues, and maintains its original softness for up to 3 months of daily use (per recommended replacement guidelines). The seamless, one-piece molding design has no hidden crevices where bacteria can grow, making cleaning fast and thorough.
4. Universal Wide Caliber Compatibility
The standard 60mm wide neck interface is rigorously tested to fit all major wide-caliber bottle brands including Philips Avent, Comotomo, Dr. Brown’s, Tommee Tippee, and Pigeon, eliminating the need for brand-specific replacement parts and reducing waste for caregivers. The design includes a secure sealing ring that prevents leaks even when the bottle is shaken vigorously for formula mixing.
Applications
This liquid silicone nipple is suitable for a wide range of infant feeding scenarios across different age groups:
Newborns (0-3 months): Slow flow variant, designed for breastfeeding infants just starting to use bottles, or premature infants with weak sucking strength, supporting low-volume, frequent feeding without overwhelming the infant.
Infants (3-6 months): Medium flow variant, ideal for formula-fed infants or those with increased feeding volume, reducing feeding time while preventing milk overflow into the trachea.
Older Infants (6+ months): Fast flow or Y-cut variant, suitable for thicker liquids such as cereal-infused formula, purees, or juice, supporting the transition to semi-solid foods.
Special Use Cases: Recommended for infants with colic, gastroesophageal reflux (GERD), or oral sensory sensitivities, as the soft texture and anti-colic design reduce feeding-related stress. It is also suitable for day care centers, childcare facilities, and neonatal wards due to its universal compatibility and easy sterilization properties.
Selection Guide
Hardness Selection
35A Extra Soft: Recommended for newborns (0-3 months), premature infants, and infants transitioning from exclusive breastfeeding to bottle feeding, as it closely mimics the softness of human breast tissue and reduces oral resistance.
45A Standard Soft: Recommended for infants 3 months and older, with increased durability to withstand stronger sucking force, and suitable for daily use for both formula and breast milk feeding.
Size Specifications
All variants use the same universal 60mm wide-caliber base, with flow rate variants tailored to age and feeding needs:
Slow Flow (1 hole): 0-3 months, 1-3 mL/min flow rate, for thin breast milk or newborn formula.
Medium Flow (2 holes): 3-6 months, 4-6 mL/min flow rate, for standard infant formula.
Fast Flow (3 holes): 6-12 months, 7-10 mL/min flow rate, for older infants with stronger sucking ability.
Y-cut (variable flow): 12+ months, flow rate adjusts with sucking strength, suitable for thickened formula, cereal, and juice.
Material Grade
All variants are manufactured from the same food-grade LSR material that meets global safety standards. For infants with severe latex allergies or highly sensitive skin, our medical-grade LSR variant (additional ISO 10993-10 skin sensitization certification) is available, with zero risk of allergic reaction.
Quality Assurance
All our liquid silicone nipples are manufactured in compliance with international infant product safety regulations, with a rigorous multi-stage quality control process:
Incoming Material Inspection: All LSR raw materials are tested for purity, heavy metal content, and biocompatibility before entering production, with batch traceability codes for all raw material lots.
In-process Quality Control: 100% of products undergo dimensional inspection, visual defect checks (no burrs, discoloration, or molding defects), and functional testing (vent flow rate, sealing performance, and sucking resistance) during production.
Post-production Testing: Each production lot undergoes third-party testing for compliance with FDA 21 CFR 177.2600, EU 10/2011, EN 14350-1, and GB 4806.2 standards, with test reports available upon request.
Warranty: We offer a 30-day no-reason return policy for unopened products, and a 12-month quality guarantee against manufacturing defects such as cracking, tearing under normal use, or discoloration within the recommended replacement period.
Certifications: The product holds BRCGS Consumer Products certification, ISO 9001 quality management system certification, and is certified carbon-neutral for its production process, supporting environmentally conscious purchasing decisions.
