Custom Silicone
Breastmilk Storage Accessories.
Precision-molded seals, caps, valves and protective sleeves for breastmilk bottles, pouches and collection containers. Food-grade silicone, leak-proof performance, fully customizable to your brand system.
breastmilk safe
Precision Sealing Disc
Tolerance ±0.05mm · 100% leak-tested
Food Grade
Every Seal Type, Engineered for Breastmilk.
From single-piece sealing discs to multi-layer valve systems -- our silicone sealing accessories eliminate leakage, preserve freshness, and withstand repeated freezing, thawing and sterilization cycles.
Sealing Discs
Flat silicone discs for wide-neck bottles; freezer-safe and dishwasher-safe.
O-Ring Gaskets
Precision-molded rings for cap-to-bottle threaded interfaces; FDA grade.
Duckbill & Anti-Reflux Valves
One-way flow valves integrated into pump adapters and bottle lids.
Pouch Spout Caps
Silicone-lined caps for storage pouches, compatible with standard spouts.
Lid Sealing Membranes
Thin-wall membranes bonded or inserted into PP/PPSU bottle lids.
Custom Hybrid Seals
Silicone + PP / silicone + stainless overmolded assemblies -- proprietary structures welcome.
Beyond the Seal -- Full System Accessories.
Connectors, adapters and protective silicone components that bridge pump, bottle and storage container into a seamless, hygienic workflow.
Pump-to-Bottle Adapters
Silicone-lined threaded converters allowing cross-brand compatibility between breast pumps and storage bottles.
Protective Bottle Sleeves
Soft silicone sleeves to protect glass or PPSU bottles from thermal shock and impact during cold-chain transfer.
Label & ID Rings
Color-coded silicone date/volume rings for storage identification -- customizable with laser-engraved markings.
Tamper-Evident Caps
Silicone-reinforced caps with break-ring indicators for professional milk-bank or clinical distribution.
Fits Every Container in Your Line.
We produce sealing accessories across the full breastmilk-container spectrum -- from 60ml collection vials to 300ml wide-neck bottles and standard 180ml storage pouches.
Mold library: 200+ existing cavities covering major neck standards (38mm wide, 43mm standard, 55mm wide-mouth, M-shape pouch spouts, pump-flange adapters).
Collection Vial
Standard Bottle
Short Bottle
Storage Pouch
Wide-neck
Large Capacity
Non-standard sizes?
We open new cavities within 15-25 working days for proprietary bottle geometries.
Material Choices That Protect Every Drop.
Only 100% platinum-cured, food-grade silicone with structural engineering tuned for breastmilk preservation.
Platinum LSR
Liquid silicone rubber with platinum catalyst -- zero peroxide residue, medical-grade purity.
Hardness Range
Shore A 30-70 selectable per part: softer for seals, firmer for structural rings and valves.
Wall-Thickness Control
Minimum 0.4mm membrane walls engineered for compression recovery and cold-cycle resilience.
Temperature Range
Stable from -40°C to +230°C -- freezer-to-sterilizer safe without deformation or odor.
BPA / BPS
Free
Phthalate
Free
PVC / Latex
Free
Heavy Metals
Compliant
0
leaks tolerated per batch
Validated Leak-Proof -- Every Single Piece.
Each sealing accessory undergoes multi-stage performance validation before leaving the production line.
Positive-Pressure Test
Internal pressure 20-50 kPa held for 60s -- no bubble release permitted.
Freeze-Thaw Cycle
-20°C ↔ +40°C, 50 cycles -- seal integrity and elasticity retention verified.
Sterilization Resistance
Boiling (100°C/30min) and steam autoclave (121°C/20min) -- no deformation.
Compression Recovery
25% compression for 24h at 70°C -- recovery ≥90% per ISO 815 standard.
Tested as a System, Not Just a Part.
Accessories are validated in full assembly with the target bottle, cap and user scenario -- because real-world performance is a system-level outcome.
Torque Verification
Cap-on torque measured within 0.4-0.8 Nm -- assembly comfortable for daily use.
Drop & Impact
1.2m drop test with filled bottle at 4°C -- seal must remain intact and leak-free.
500-Cycle Fatigue
Repeated open/close cycles simulating 6 months of real-world consumer usage.
Dimensional Stack-Up
Tolerance analysis of silicone + cap + bottle interfaces to ensure consistent fit.
Cold-Chain Simulation
Full assembly stored at -18°C for 30 days, then thawed -- zero micro-leakage required.
Full-Report Delivery
Every custom project receives a signed PPAP-style validation report before mass production approval.
Sample Day One, Batch Day 365 -- Identical.
Our SOP-driven production and SPC-controlled quality system guarantee each production run matches the approved sample without drift.
Dimensional Tolerance
Precision silicone molding with laser-measured cavity verification per shift.
Full-Piece Inspection
Visual, dimensional and leak check on every finished accessory before packing.
Statistical Sampling
Third-party-ready AQL inspection standard for buyer-driven QC audits.
Golden Sample Retention
Each approved sample is sealed, dated and archived in our climate-controlled golden sample library. Every subsequent batch is compared physically and dimensionally to the retained reference -- ensuring your brand's product identity never drifts.
year
archive
Delivered Clean. Documented Completely.
Hygienic packaging options and full documentation archive -- ready for retail, clinical or e-commerce distribution.
Packaging Options
- ✦ Individual PE bag + ultrasonic seal (clean-room optional)
- ✦ Blister card with full-color brand artwork
- ✦ Branded gift box with silicone-safe inserts
- ✦ Bulk cartons with moisture barrier for industrial supply
Product Archive Includes
- ✦ 2D/3D drawings & tolerance maps
- ✦ Material certificates (FDA / LFGB / REACH)
- ✦ Validation reports & test photos
- ✦ Mold maintenance log & lifecycle records
Start Your Storage Accessory Project.
Tell us about your bottles, pouches, pump adapters or protective sleeves. We respond with structural feasibility and quote within 24 business hours.