Explore our high-demand manufactured lines, featuring food-grade materials, shatterproof polymers, and precision sealing components for retail and commercial buyers.
As the global market for home fermentation, probiotic food preservation, and specialized food storage rapidly expands, commercial procurement managers, retail brands, and food equipment distributors require ultra-reliable, food-grade anaerobic sealing mechanisms. The standard Mason jar (wide-mouth 86mm and regular-mouth 70mm ISO threads) has evolved from a basic canning vessel into a high-precision biological reactor for lacto-fermentation, sauerkraut, kimchi, kombucha, and homebrewing. Central to this process is the Mason Jar Airlock—an engineered one-way pressure relief valve system designed to vent carbon dioxide ($CO_2$) generated during anaerobic microbial metabolism while strictly eliminating oxygen ($O_2$) ingress, mold spores, and wild airborne bacteria.
Funtime Plastics (Xiamen) Co., Ltd., operating as an elite manufacturing subsidiary of Charmlite Co., Ltd., brings over two decades of polymer processing, injection mold toolmaking, and food-contact compliance expertise to global buyers. This document outlines the technical design parameters, polymer material science, wholesale cost metrics, and quality assurance framework required when sourcing high-volume Mason jar airlocks from China.
To sustain active lactobacillus proliferation, internal headspace atmospheric pressure must remain slightly positive (+0.05 to +0.15 bar) relative to ambient room pressure. Airlock assemblies engineered by Funtime Plastics feature calibrated silicone duckbill valves, 3-piece water bubble chambers, and automatic waterless silicone membranes engineered with a cracking pressure threshold precisely calculated between 0.2 and 0.5 PSI.
Constructed from liquid silicone rubber (LSR) with a Shore A hardness rating of 40–50. Self-sealing, maintenance-free, ideal for compact retail fermentation kits where liquid maintenance (water-filled airlocks) is undesirable.
Molded from crystal-clear, food-grade Polypropylene (PP) or Tritan Copolyester. Allows continuous visual monitoring of fermentation bubble velocity ($CO_2$ generation rate) while preventing back-siphonage.
Heavy-duty food-grade silicone gaskets embedded into stainless steel or BPA-free ABS jar caps, providing 100% airtight hermetic seals against jar rim tolerances ($\pm 0.15\text{ mm}$).
Direct-from-factory volume purchasing guarantees maximum commercial margin for brand owners, Amazon FBA sellers, and global distributors. Below is our standard manufacturing pricelist matrix based on order volume tier, material selection, and customization requirements.
| Product Category / Airlock Model | Material Spec | MOQ (Units) | 1,000 - 4,999 Units | 5,000 - 19,999 Units | 20,000+ Units (Tier 1 Direct) | Tooling / OEM Lead Time |
|---|---|---|---|---|---|---|
| Waterless Silicone Valve Lid (86mm Wide Mouth) | Food-Grade LSR Silicone + ABS Ring | 1,000 | $0.48 / pc | $0.36 / pc | $0.25 / pc | Sample: 3 days | Batch: 15 days |
| 3-Piece Bubble Airlock + Silicone Grommet Set | PP Clear Chamber + Medical Silicone Grommet | 2,000 | $0.42 / pc | $0.31 / pc | $0.21 / pc | Stock Tooling | Batch: 12 days |
| Premium Eastman Tritan™ Fermentation Airlock Top | BPA/BPS-Free Tritan Copolyester + LSR Valve | 3,000 | $0.85 / pc | $0.68 / pc | $0.49 / pc | Custom Mold: 25 days |
| Complete Mason Fermentation Kit (Lid, Airlock, Weight, Pump) | Mixed Food Grade (Glass/Silicone/Tritan) | 500 Sets | $3.80 / set | $2.95 / set | $2.15 / set | Custom Packaging Included |
| Heavy-Duty Stainless Steel Airlock Lid Assembly | 304 Stainless Steel + LSR Valve Insert | 1,000 | $1.25 / pc | $0.98 / pc | $0.74 / pc | Laser Engraved Logo: Free |
*Note: Ex-Factory (EXW) or FOB Xiamen prices. Customized color matching (Pantone PMS), private-label retail packaging, and customized master carton dimensions are fully negotiable depending on production scheduling.
Combining Charmlite's 20+ years of export excellence with Funtime Plastics' automated Xiamen production facility.
With the setup of its subsidiary factory Funtime Plastics (Xiamen) Co., Ltd. and in-house molding lines, our group delivers elite injection-molded, blow-molded, and custom polymer drinkware solutions worldwide.
Funtime offers a range of plastic wine glasses manufactured from LFGB-certified, food-grade materials such as PET and Tritan. These glasses are guaranteed to be BPA-free. Their thickened material enhances sturdiness and durability, effectively resisting deformation. As shatterproof and reusable alternatives to glass, they provide a practical and elegant solution for diverse occasions—from formal weddings and banquets to outdoor events on terraces and beaches.
Don’t just sip your slushie—experience it. With over 100 vibrant designs and sizes from 12oz to 100oz, Funtime’s break-resistant and spill-proof Yard Cups keep your frozen drinks safe and delicious. Customize them for any occasion, and enjoy them with margaritas, daiquiris, frozen coffee, and more. Taste the fun, without the waste.
Every component—cup, lid, and straw—is engineered to lock securely, creating a perfect seal that prevents leaks from the start. Built to be crack-resistant, these cups won’t bend, leak, or cave in, ensuring your drinks from iced lattes to party punches remain perfectly contained. They deliver dependable performance for daily use, extensive catering spreads, and the relentless pace of a busy café.
Our reusable water bottles offer the perfect blend of durability and convenience. Made from tough, lightweight plastic, they feature a leak-proof cap to eliminate messes. Built to withstand daily use, they’re your go-to for hydration during workouts, outdoor adventures, or a day at the office. Enjoy your favorite beverages wherever life takes you.
Procuring Mason jar airlocks, plastic drinkware, and food containers directly from our Xiamen manufacturing hub gives global buyers an unassailable competitive advantage in unit economics, quality consistency, and fast-track product innovation.
Our workshop houses 42 high-precision injection molding machines, automated blowing machines, polymer extruders, and multi-color branding printers. This high degree of automation ensures 99.9% punctual delivery and zero-defect quality control.
We do not outsource mold creation. Our dedicated mold workshop turns CAD/CAM concepts into 3D steel molds rapidly. We can produce physical working samples for complex airlock valves and specialty container lids in as little as 7 to 10 days.
Funtime is at the forefront of sustainable plastic manufacturing. In addition to 100% recyclable Tritan, PET, and PP, we actively incorporate PLA (Polylactic Acid) and PCR (Post-Consumer Recycled) resins into container and airlock components.
With our core technical personnel and high independent R&D capacity, we support brand owners from initial concept sketches to mass-market retail rollout.
We collaborate closely with you from the very beginning to fully understand your product vision and market needs. Whether it’s functional airlock valve pressure refinement or creative drinkware exploration, we provide expert guidance and proven solutions to help shape the ideal container design.
Based on your concept, we deliver end-to-end customization—from bottle/jar airlock structure and silicone gasket pairing to logo placement, PMS color schemes, textures, and surface finishes. Every detail is tailored to reflect your brand, including retail-ready box packaging.
Once the 3D model design is confirmed, we produce physical samples for your hands-on laboratory and aesthetic review. This step ensures airlock degassing performance, seal ergonomics, and material clarity meet strict standards before full mold commitment.
After sample approval, we launch into high-volume standardized manufacturing. Supported by rigorous AQL inspection standards and full quality control, we guarantee consistent product quality and reliable shipping timelines—making us your trusted long-term supply partner.
Sourcing food-contact items like Mason jar airlocks, novelty drinkware, and wine tumblers requires absolute adherence to international safety standards. Funtime Plastics undergoes rigorous third-party facility audits every single year.
All resins (Tritan, PP, PET, SAN) and silicone compounds are certified 100% BPA-free, BPS-free, heavy metal-free, and phthalate-free, meeting US FDA 21 CFR and German LFGB food contact standards.
Funtime is officially authorized by Disney Facility and Merchandise Authorization (FAMA), proving high standards of labor rights, factory security, and manufacturing transparency for promotional lines.
Our annual audits by Sedex (SMETA), BSCI, and Merlin Confirm our commitment to ethical supply chain practices, workplace safety, environmental safety, and fair compensation.
Understanding regional consumer preferences and industrial applications enables B2B buyers to select the right Mason jar airlock configuration for their destination market.
In North America, wide-mouth Mason jars (Ball, Kerr, Bernardin) dominate the home food preservation market. Buyers demand "Waterless Silicone Valve Lids" that fit low-profile kitchen cabinets while maintaining aesthetic appeal for social media food creators.
European importers favor classic 3-piece S-bubble airlocks with high-clarity Tritan components compliant with strict EU 10/2011 chemical standards. Common uses include small-batch sauerkraut fermentation, vinegar crafting, and home cidermaking.
Beyond fermentation, high-capacity novelty drinkware (such as Charmlite's Yard Cups, Dolphin Slush Cups, and LED yards) drives massive revenue in amusement parks, cruise lines, and daiquiri bars across North America, East Asia, and Europe.
Direct technical insights from our engineering and sales export team to help streamline your sourcing decisions.
A waterless silicone airlock utilizes a self-sealing LSR duckbill or slit valve that releases $CO_2$ automatically without requiring water filling, making it compact and maintenance-free. A 3-piece bubble airlock uses a water barrier inside a clear chamber, allowing visual monitoring of gas release bubbles. Both effectively block oxygen ingress.
Yes. Our fermentation lids and airlock grommet caps are engineered precisely according to standard Wide-Mouth (86mm outer diameter) and Regular-Mouth (70mm outer diameter) glass jar thread specs common in global retail markets.
We manufacture using food-grade Polypropylene (PP), Polyethylene Terephthalate (PET), Acrylonitrile Styrene (SAN), Acrylic, and premium Eastman Tritan™ Copolyester. All materials undergo strict FDA and LFGB compliance testing to ensure they are 100% BPA-free and shatterproof.
Our standard flexible MOQs range from 1,000 to 3,000 units depending on standard vs custom PMS color specifications. Sample validation takes 3–5 days, while full bulk production runs typically ship within 15–25 business days from order deposit.
Absolutely. We specialize in OEM and ODM turnkey solutions. We provide custom laser-etched logos, screen printing, embossed lid branding, custom-printed color retail boxes, barcoding, and master carton customization suited for Amazon FBA or direct retail distribution.
Funtime Plastics and Charmlite actively participate in international ethical audits and corporate developments to deliver continuous excellence.
Our Xiamen production facility successfully renewed the Merlin Ethical Audit, confirming optimal health, safety, and operational transparency standards for major theme park supply contracts.
Learn MoreCelebrating team cohesion and corporate culture development, Funtime Plastics organized an annual company-wide cultural excursion to honor outstanding production achievements.
Learn MoreHighlighting team dedication and reviewing year-over-year production growth across our specialized drinkware, yard cup, and Mason jar accessory manufacturing divisions.
Learn MoreBrowse the remainder of our engineered reusable drinkware, novelties, and heavy-duty plastic pitchers engineered for food service, bars, and retail distribution.
Charmlite Cup
