Before shipment, stainless steel insulated bottles produced in our factory undergo a series of functional performance tests.
These tests focus on how the product performs under real-world usage conditions, including impact resistance, thermal stability, and sealing reliability.
Note: This page introduces selected functional performance tests. Other test categories, such as material safety and surface durability, are documented separately.
Scope of This Page: Functional Performance Testing
To avoid misunderstanding, it is important to clarify the scope of testing covered here.
This page focuses on key functional tests that directly affect:
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Daily usability
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Safety during handling
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Heat retention performance
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Leak-proof reliability
These tests are applied as part of our routine internal quality control for stainless steel vacuum insulated bottles.
1. Impact Resistance & Swing Impact Test
Purpose:
To evaluate the bottle’s structural durability during drops, collisions, and handling impacts.
Test setup & method:
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Bottle is suspended vertically using a hanging strap
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Drop height: 400 mm
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Impact directions:
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Vertical drop
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45° angled impact
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Impact surface: hard wooden board
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Test state: static, uncontrolled release
Inspection criteria:
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Body deformation
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Structural cracks
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Weld integrity
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Functional failure
2. Thermal Insulation Performance Test
Purpose:
To verify heat retention performance under controlled conditions.
Testing procedure:
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Hot water at 95°C is filled into the bottle
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Lid is sealed immediately
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Bottles are placed in the same ambient environment
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Test duration: 6 hours
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Bottle selection considers:
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Capacity
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Mouth diameter
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Acceptance requirement:
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Internal water temperature after 6 hours must remain ≥ 42°C
3. Heat Resistance Test for Rubber Sealing Components
Purpose:
To confirm sealing ring stability under prolonged exposure to hot liquids.
Test method:
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Rubber sealing rings are placed in a reflux condensation container
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Mild boiling for 4 hours
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Natural cooling for 2 hours
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Visual inspection without instruments
Inspection focus:
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Stickiness
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Deformation
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Surface degradation
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Shape recovery
4. Leak-Proof Sealing Test
Purpose:
To verify sealing reliability during movement and handling.
Testing steps:
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Bottle is filled with 50% capacity of water above 90°C
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Lid is fully sealed
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Bottle is held upright
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Vertical shaking:
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Amplitude: 500 mm
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Frequency: 1 cycle per second
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Total: 10 cycles
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Pass condition:
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No visible water leakage
Why We Document These Functional Tests
Functional performance tests help ensure that stainless steel insulated bottles meet real-use expectations for:
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Retail and consumer products
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Corporate gifting programs
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Private label and OEM projects
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Long-distance shipping and daily handling
All tests shown are conducted as part of our routine internal quality control process.
For OEM & Customized Projects
For OEM orders, test parameters may be adjusted based on:
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Product structure
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Intended usage
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Target market requirements
Our engineering and QC teams can support:
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Sampling evaluation
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Test result explanations
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Custom quality documentation
