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:
Daily usability
Safety during handling
Heat retention performance
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:
Bottle is suspended vertically using a hanging strap
Drop height: 400 mm
Impact directions:
Vertical drop
45° angled impact
Impact surface: hard wooden board
Test state: static, uncontrolled release
Inspection criteria:
Body deformation
Structural cracks
Weld integrity
Functional failure
2. Thermal Insulation Performance Test
Purpose:
To verify heat retention performance under controlled conditions.
Testing procedure:
Hot water at 95°C is filled into the bottle
Lid is sealed immediately
Bottles are placed in the same ambient environment
Test duration: 6 hours
Bottle selection considers:
Capacity
Mouth diameter
Acceptance requirement:
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:
Rubber sealing rings are placed in a reflux condensation container
Mild boiling for 4 hours
Natural cooling for 2 hours
Visual inspection without instruments
Inspection focus:
Stickiness
Deformation
Surface degradation
Shape recovery
4. Leak-Proof Sealing Test
Purpose:
To verify sealing reliability during movement and handling.
Testing steps:
Bottle is filled with 50% capacity of water above 90°C
Lid is fully sealed
Bottle is held upright
Vertical shaking:
Amplitude: 500 mm
Frequency: 1 cycle per second
Total: 10 cycles
Pass condition:
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:
Retail and consumer products
Corporate gifting programs
Private label and OEM projects
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:
Product structure
Intended usage
Target market requirements
Our engineering and QC teams can support:
Sampling evaluation
Test result explanations
Custom quality documentation