Featured Blogs

Are the plastic components BPA-free and food-s...

Are the plastic components BPA-free and food-safe?

Aug 05,2026
The Quanhu S6005VH 600ml Portable Travel Tumbler is a BPA Free vacuum insulated cup with a 2-in-1 sip and straw lid. This blog explains that the plastic components are positioned as BPA-free and food-safe, and directs readers to contact Quanhu for further compliance information.
Can I get custom packaging for large drinkware orders?

Can I get custom packaging for large drinkware orders?

Jul 17,2026
Learn how Qualflask offers custom packaging solutions for large drinkware orders. Highlight your brand, ensure product safety, and choose eco-friendly options with our tailored designs.
Can I get samples before placing a bulk order for custom promotional cups?

Can I get samples before placing a bulk order for custom promotional cups?

Jul 23,2026
Find out how to request samples for custom promotional cups at Qualflask before placing your bulk order. Ensure the quality, design, and satisfaction of your custom products.

Can the bottles withstand high temperatures in...

Can the bottles withstand high temperatures in a dishwasher without damaging the coating?

Aug 18,2026
High-grade stainless steel can withstand dishwasher heat, but coatings may be vulnerable. This article explains how coating quality and surface treatment affect dishwasher safety, and why hand washing is often the best choice for preserving bottle appearance.

Can you customize packaging with my brand logo...

Can you customize packaging with my brand logo and design?

Jul 26,2026
QualFlask (Zhejiang Quanhu) provides full OEM/ODM services for stainless steel drinkware. You can customize packaging with your brand logo and design, including boxes, labels, and inserts. With 65+ 3D models and quick production, it's ideal for private label brands.
Can you develop custom molds for unique bottle shapes and sizes?

Can you develop custom molds for unique bottle shapes and sizes?

Jul 11,2026
QualFlask provides custom mold development for creating unique bottle shapes and sizes. Learn about our tailored packaging solutions and industry expertise.

Can you provide thermal performance data for d...

Can you provide thermal performance data for different bottle sizes?

Sep 01,2026
Understand how thermal performance varies by bottle size and why specific data matters. Get answers for the 18oz Vacuum Insulated Hydration Bottle (S5401V-18oz) and learn how to obtain official thermal test data from QualFlask.

Do you have automated laser welding for the va...

Do you have automated laser welding for the vacuum seal?

Sep 08,2026
Wholesale buyers frequently ask whether our factory uses automated laser welding for the vacuum seal. This article explains how automated vacuum-seal welding supports consistent quality, high-volume production, and reliable delivery for OEM & ODM stainless steel drinkware orders such as the S5401V-18oz hydration bottle.

Do you have custom vacuum insulation technolog...

Do you have custom vacuum insulation technology for extreme temperature retention?

Aug 25,2026
Learn how Quanhu delivers custom vacuum insulation technology for extreme temperature retention, including leak-proof performance, capacity-based data, and OEM/ODM customization support.

Do you offer bottles made from 316 stainless s...

Do you offer bottles made from 316 stainless steel for acidic beverages?

Aug 04,2026
This blog addresses the question of 316 stainless steel bottles for acidic beverages. As a professional drinkware manufacturer, Zhejiang Quanhu offers custom solutions and direct consultation to confirm material availability, while highlighting food safety, surface treatment, and contact details.
Do you offer custom color matching and Pantone color options for branded bottles?

Do you offer custom color matching and Pantone color options for branded bottles?

Jul 13,2026
Explore the benefits of custom color matching and Pantone options for branded bottles at QualFlask, ensuring exceptional brand consistency and recognition.
Do you offer sample production before bulk orders?

Do you offer sample production before bulk orders?

Jul 27,2026
Learn how Zhejiang Quanhu Industry & Trade Co., Ltd. supports private label partners with sample production before bulk orders. Discover our 3D customization tool, rapid sample turnaround, and quality assurance for custom stainless steel drinkware.