This product is made of food-grade liquid silicone, safe and odorless, compatible with most mainstream duckbill cups. It has excellent bite resistance, wear resistance, leak-proof and anti-choke design, can be sterilized at high temperature without deformation, and is an ideal accessory for baby water cup replacement.
Material
Food-grade LSR
Hardness
Shore A 30-40
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Transparent, Pink, Blue, Customizable
# Food Grade Liquid Silicone Duckbill Cup Accessories Leak-proof Bite-resistant Baby Water Cup Replacement Spout
Our food-grade liquid silicone rubber (LSR) duckbill cup spout is a purpose-built replacement component designed to extend the service life of baby water cups and sippy cups while prioritizing infant safety, feeding comfort, and parent convenience. Engineered as the core contact part between babies and drinking utensils, this spout replaces rigid plastic or low-quality rubber alternatives, eliminating common pain points such as leakage, easy tearing after repeated biting, and harmful substance leaching.
The spout features a patented duckbill-shaped opening that mimics the natural latch mechanism of breastfeeding, supporting a smooth transition from bottle to cup for babies aged 6 months and above. Its self-sealing structural design ensures no liquid spills when the cup is tilted or dropped, reducing mess during outdoor trips, car rides, and independent feeding practice. Formulated with medical-grade LSR raw materials compliant with global food contact safety standards, the spout is free of BPA, phthalates, PVC, lead, and other endocrine-disrupting chemicals, making it safe for prolonged contact with breast milk, formula, fruit juice, and warm water.
This spout is manufactured via high-precision injection molding with a clamping force of 120 tons, ensuring consistent wall thickness of 0.8±0.05mm across all units. The molding temperature is controlled at 180-190°C with a curing time of 30s, eliminating post-curing requirements and reducing residual low-molecular-weight substances. The edge trimming process uses automatic laser cutting to achieve burr-free edges with a roughness of Ra ≤0.8μm, preventing gum irritation to babies’ delicate oral tissues. The connection port tolerance is controlled within ±0.03mm to ensure a tight fit with 95% of mainstream sippy cup brands on the market.
The spout combines two leak-proof mechanisms to eliminate spills in all scenarios: a built-in cross-cut slit at the duckbill tip that opens only when the baby applies gentle biting or sucking pressure, and a reinforced sealing ring at the base that forms an airtight bond with the cup body. Unlike single-slit designs, the cross-cut structure adjusts flow rate according to sucking strength, preventing excessive liquid flow that causes choking, while remaining fully sealed when not in use. This design reduces spillage by 99% compared to conventional spouts, even when the cup is dropped or shaken violently.
Formulated with high-toughness LSR with 600% elongation at break, the spout withstands prolonged biting from teething infants without cracking, tearing, or leaving microplastics in the liquid. Our accelerated fatigue testing confirms that the spout maintains structural integrity after 15,000 simulated bites, equivalent to 3-6 months of normal use, which is 3 times longer than ordinary silicone spouts on the market. The material’s low compression set ensures the sealing performance remains unchanged even after repeated assembly and disassembly.
Platinum curing system used in the production process avoids the peroxide residues common in conventional silicone curing, eliminating unpleasant odors and harmful leachates even when exposed to high temperatures. The non-porous LSR surface resists bacterial adhesion: lab testing shows that the spout has 92% less E. coli and S. aureus colonization after 24 hours of use compared to plastic spouts, and it can be thoroughly cleaned via boiling, steam sterilization, UV disinfection, or dishwasher top-rack cleaning without degrading.
The 40 Shore A hardness is precisely calibrated to be soft enough to protect baby’s gums and emerging teeth, while providing sufficient structural support to encourage proper jaw and oral motor development. The duckbill shape aligns with the natural palate contour of infants, avoiding abnormal tooth alignment caused by prolonged use of hard spouts. The smooth, burr-free surface prevents irritation to the lips and oral mucosa, making it suitable for babies with sensitive skin.
These LSR duckbill spouts are suitable for a wide range of infant feeding scenarios, including:
Custom sizes are available for OEM customers to match specific cup body designs.
All our LSR duckbill spouts are manufactured in ISO 9001 and ISO 13485 certified clean workshops with a class 100,000 dust-free environment, ensuring no contamination during production. Each batch undergoes strict quality inspection before delivery:
We provide a 3-month quality warranty for all spouts: any quality problems such as cracking, deformation, or leakage under normal use conditions will be replaced free of charge. All products come with complete test reports and certification documents to meet the regulatory requirements of major global markets including North America, the European Union, and the Asia-Pacific region.
