Quality Control & Testing: How We Ensure Durability and Thermal Performance

At Healthkin + Jakon (Zhejiang Jiakang Stainless Steel Product Co., Ltd.), quality isn't just a checkbox — it's the core of every mug, tumbler, vacuum flask, hydration bottle, and large jug we manufacture. When you ask, "What specific tests do you conduct for durability and thermal performance?" we're proud to walk you through our rigorous quality assurance process and the third-party certifications that back it up.

Durability Testing: Built for Real Life

Our stainless steel and plastic products are designed to endure daily use, drops, rough handling, and repeated washing. To verify their resilience, we conduct a series of targeted durability tests:

• Drop Test: Filled and unfilled products are dropped from standard heights onto hard surfaces to ensure the body, lid, and handle remain intact and functional.
• Abrasion & Scratch Test: Surfaces are rubbed with abrasive materials to check that coatings, prints, and logos do not easily wear off.
• Lid & Seal Endurance Test: Lids are opened and closed thousands of times to simulate long-term use, confirming the hinge, threads, and gasket keep working smoothly.
• Handle & Strap Strength Test: Pull tests are applied to handles, straps, and carabiner loops to ensure they can bear realistic weight without breaking.
• Temperature Cycling Stress Test: Products are exposed to rapid hot-to-cold cycles to check for warping, cracking, or stress fractures over time.

Thermal Performance Testing: Keeping Temperatures on Target

For vacuum bottles and tumblers, thermal retention is everything. Our thermal performance suite measures how well each product preserves hot or cold temperatures under real-world conditions:

• Insulation Retention Test: Products are filled with hot or cold liquid, sealed, and monitored with calibrated temperature probes over several hours to measure temperature curves and insulation efficiency.
• Bottle Surface Temperature Test: We check the exterior temperature of vacuum products to ensure safe-to-touch surfaces and verify proper vacuum insulation.
• Leakage & Pressure Test: Lids and seals are tested with both liquid and air pressure to confirm there are no leaks, even when the bottle is tipped or shaken.
• Cold / Hot Shock Test: Thermal shock testing quickly alternates between extreme temperatures to ensure the vacuum layer and materials do not fail.

Third-Party Certification & Independent Verification

While our internal lab tests are thorough, we also believe in independent validation. We regularly work with accredited third-party laboratories to verify our products meet international standards for food safety, material quality, and performance. These certifications give our customers and partners confidence that every Healthkin + Jakon product has passed rigorous, unbiased scrutiny.

Our Commitment to Quality

From raw material inspection to final pre-shipment checks, every batch is subject to our documented quality control procedures. We combine standardized test methods with industry best practices to ensure durability and thermal performance are never compromised. When you choose Healthkin + Jakon, you're choosing products that are tested to last — and to keep your drinks at the perfect temperature for hours.

Have a question about our testing or need a custom solution? Contact us at [email protected] and our team will be happy to assist.