Vacuum Flask Supplier in China

Mass Production

Global Shipping Support

OEM & ODM Customize

Safety Certifications

Professional drinkware manufacturer from China. We produce stainless steel insulated bottles and borosilicate glass cups. OEM & ODM customization available. Our items meet EU & US safety standards for wholesale clients worldwide.

Stainless Steel Bottles

Durable stainless steel vacuum insulated drinkware including sports water bottles, portable tumblers and travel mugs. Custom colors, logos and lids are supported.

Glass Water Cup

High borosilicate glass bottles with protective silicone sleeves, sealed lids and optional glass straws. Accept custom logo, colors and specifications. Wholesale & private label orders welcomed.

Explore Our Vacuum Flask

Stainless Steel Water Bottle Supplier

Situated in Yongkang, Zhejiang Province, famous as China’s hardware manufacturing base, our factory is a seasoned manufacturer specializing in all kinds of vacuum flasks, insulated tumblers and thermal travel mugs. As a direct China thermos factory without middlemen, we have complete automated production lines and a professional R&D design team. Besides standard ready-to-ship insulated bottles in various capacities, we provide one-stop OEM & ODM customization solutions, including mold opening, color customization, laser engraving, silk screen printing and customized outer package. We strictly follow international food-grade material standards and pass related safety tests, serving long-term bulk order clients from North America and Europe with trustworthy manufacturing and after-sales support.

Why Choose Us?

Our stainless steel insulated tumblers are exported to over 60 countries worldwide—with a primary focus on European and American markets—and we have served more than 1,000 clients to date. We offer professional, compliant, one-stop OEM/ODM services, stable high-volume production capacity, and comprehensive, flexible customization options to meet all your brand's drinkware manufacturing needs.

OEM & ODM Manufacturing

Turn your original water bottle concepts and custom designs into finished mass-produced goods. We also support private label printing on our existing cup molds to help you quickly expand your drinkware line with full export compliance certifications for global retail business.

High Volume Stable Production

Equipped with automated production lines, professional technical teams and strict quality control systems, we guarantee consistent lead times all year round. We reliably fulfill large bulk orders and repeat restock shipments without delivery delays.

Customize every detail including bottle shape, lid styles, surface finish treatment, color matching, brand logo printing and accessory kits. We tailor market-ready drinkware items aligned with your brand positioning, budget and product launch timeline for direct shelf sales.

Fully Flexible Customization

Customer reviews

Discover what our clients think about our service

As a German distributor we are strict on LFGB and thermal performance claims. Renverge Tech’s double-wall vacuum bottles delivered 12h hot / 24h cold in our Hamburg lab, and the powder-coating survived our drop test. We customized 5 SKUs with private mold lids and matte finishes—their R&D team gave DFM feedback that actually saved us tooling cost. Stable monthly output, clear QC reports, no middleman excuses. Exactly what a European wholesaler needs.

Katharina Vogel

We sourced stainless steel tumblers from Renverge Tech for our 2025 corporate gift catalog and the whole process was frictionless. Their Yongkang factory sent pre-production samples with laser engraving and silk-screen logo options within 7 days. The 304/316 body finish passed our US FDA lab check, and the 40oz tumblers held ice for 24+ hours in our internal test. Reorder of 8,000 pcs shipped on time despite peak season. Finally a China thermos partner that talks like a B2B supplier, not a trading company.

Daniel Brooks

★★★★★

★★★★★

★★★★★

We moved part of our Stanley-alternative sourcing to Renverge Tech after meeting them via email quote. The 20oz travel mugs with custom outer box passed UK REACH and our 5000-pc trial sold through in 6 weeks on Amazon UK. What stood out: they speak proper English on specs, send batch QC photos, and handle OEM lid swaps without moaning. For a UK wholesaler, the combo of Yongkang direct-factory price and export-compliant docs is rare.

James Whitfield

★★★★★

Our company needed stainless steel tumblers for the Aussie café and promo market. Renverge Tech supplied both categories with silicone sleeve customization and laser logo. Sea freight to Melbourne was predictable, cartons well packed, no rust claims. Their MOQ flexibility let us test 300 pcs per SKU before going 3000+. Great partner for ANZ wholesalers who want one factory for multi-material drinkware.

Olivia Nguyen

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