Quick answer: In this real customer sample inspection, a 500ml soft flask sample was measured at 22 × 8cm and 74g. The inspection also included print adhesion, material and construction checks, and a water leakage test.
The test was performed on June 26, 2026 by Hangzhou Dawnjoint Business And Trading Co., Ltd. / Honey Dry Bag.
Two samples were included in the project and both were sampled for inspection.
This article uses an actual internal sample test report rather than a hypothetical testing procedure.
Customer-identifying information, order information and customer branding have been redacted from the public version to protect commercial confidentiality.
What Was Checked in This 500ml Soft Flask Sample?
For this customer project, the report recorded:
Test date: June 26, 2026
Quantity: 2 samples
Sampling quantity: 2 samples
Measured weight: 74g
Measured dimensions: 22 × 8cm
Testing tools included:
- 3M tape
- Eraser
- Water
- Ruler
- Digital scale
The inspection covered several practical characteristics of the finished sample, including dimensions, weight, printing, material condition and water leakage.
The following photographs are from the actual sample inspection.
1. How Much Did This 500ml Soft Flask Sample Weigh?
The measured weight recorded for this sample was:
74g
The sample was placed on a digital scale during the inspection rather than relying only on a nominal specification.
Weight can be an important consideration for products designed for running, trail running and endurance activities.
However, a buyer should not assume that every 500ml soft flask has the same weight.
The final weight of a customized product can be affected by factors such as:
- Flask construction
- Cap design
- Bite valve
- Additional strap or carrying components
- Product dimensions
- Custom configuration
For this reason, the 74g figure in this article refers specifically to the sample documented in this report.
It should not be interpreted as the weight of every 500ml soft flask.
2. What Were the Actual Soft Flask Dimensions?
The physical dimensions of the sample were checked using a ruler.
The recorded size was:
22 × 8cm
Why does this matter?
Because 500ml describes capacity, not the complete shape of a soft flask.
Two products can both be described as 500ml while having different:
- Lengths
- Widths
- Body profiles
- Neck designs
- Cap configurations
These differences can matter when the soft flask is intended for a running vest or hydration system.
A buyer developing a custom 500ml soft flask should therefore consider both capacity and actual physical dimensions.
For projects where compatibility with a particular running vest pocket is important, checking the physical sample can provide information that nominal capacity alone cannot.
3. How Was the Custom Printing Checked?
For OEM and private-label soft flask projects, printing is part of the finished product specification.
The report documents a practical printing adhesion test.
3M tape was firmly attached to the printed area and then quickly removed.
The same test was performed twice at the same position.
The printing was also wiped with an eraser and then inspected for color loss or decoloration.
The acceptance criterion recorded in the report was that printing without color loss was considered qualified.
For the inspected sample, the observation was:
No colour loss or decoloration at the printing.
This result applies to the samples documented in this inspection.
4. Material and Construction Inspection
A soft flask is a flexible product.
During normal use it can repeatedly be:
- Filled
- Squeezed
- Bent
- Compressed
- Carried inside a running vest
- Removed and reinserted
- Emptied
- Refilled
Because of this, inspecting only the appearance of a sample is not enough.
The test method documented in this report included rubbing and pulling the material, with particular attention to relevant construction and hot-pressed areas.
The recorded observation was:
Correct color and no cracking on the material, hot pressing connection and sewing area.
Again, this is a result recorded for the inspected samples rather than a universal claim about every soft flask.
5. How Was Water Leakage Checked?
Leakage is one of the practical functional characteristics we check during soft flask sample evaluation.
For this inspection, the product was filled with water and squeezed firmly to check whether water leaked from the flask.
The report defined the judgment method as:
No leakage = qualified
Leakage = unqualified
For the inspected samples, the recorded observation was:
No water leakage.
The final conclusion of the inspection was:
QUALIFIED
Why Weight and Dimensions Matter for B2B Buyers
When sourcing a 500ml soft flask, buyers often start with capacity.
For example:
250ml
350ml
500ml
600ml
Capacity is important, but it does not tell the complete story.
For a product intended to work with a running vest, the buyer may also need to consider:
- Overall flask length
- Body width
- Neck position
- Cap diameter
- Bite valve design
- Filled shape
- Empty shape
- Weight
- Pocket compatibility
This is one reason we prefer to use real measurements when discussing a particular sample rather than assuming that every product with the same nominal capacity has identical dimensions.
In this specific case, the inspected sample was recorded as:
500ml nominal capacity
22 × 8cm measured dimensions
74g measured weight
Those figures provide a more concrete description of the actual sample.
What Should a Buyer Confirm on a 500ml Soft Flask Sample?
For an OEM or private-label project, a buyer can use the sample stage to confirm more than appearance.
A practical review can include:
Capacity and Dimensions
- Target capacity
- Length
- Width
- Overall shape
- Fit with the intended running vest
Weight
- Actual finished sample weight
- Components included in the measurement
- Differences caused by customized accessories
Branding
- Logo size
- Logo position
- Print appearance
- Print adhesion
Construction
- Material condition
- Hot-pressed areas
- Neck connection
- Cap
- Bite valve
- Additional straps or components
Function
- Leakage
- Compression
- Drinking performance
- Compatibility with the intended use
The exact checklist should depend on the buyer's product requirements.
Why We Are Showing the Actual Test Report
Statements such as:
"Strict quality control"
or
"High-quality soft flask"
are easy to put on a supplier website.
They do not, by themselves, show what was actually checked.
For this reason, we are gradually publishing more first-hand evidence from our real soft flask projects on Farhview.com.
This case includes:
- An actual sample test report
- A real test date
- Real sample photographs
- Digital scale measurement
- Ruler measurements
- Printing inspection
- Material and construction inspection
- Water leakage testing
- Recorded inspection results
At the same time, customer confidentiality is important.
Customer names, order information and identifiable customer branding are therefore removed or redacted before these materials are published.
What This Report Does Not Prove
This distinction is important.
This article documents the inspection of the specific samples shown in the report.
It does not mean that:
- Every 500ml soft flask weighs 74g
- Every 500ml soft flask measures 22 × 8cm
- One sample inspection guarantees every future production unit
- An internal QC report replaces independent laboratory testing
- This report is a regulatory or food-contact certificate
Those would be broader claims than this report supports.
The measurements and results published here belong to this particular sample inspection.
When a customer project requires specific food-contact, chemical or regulatory testing, those requirements should be evaluated separately according to the product and destination market.
Final Result of This 500ml Soft Flask Inspection
For this real customer sample inspection, the report recorded:
Sampling: 2 of 2 samples
Weight: 74g
Size: 22 × 8cm
Printing: No colour loss or decoloration observed
Material and construction: Correct color and no cracking observed in the inspected areas
Water leakage: No leakage observed
Final conclusion: QUALIFIED
This provides a real example of the type of physical information that can be checked before a customized soft flask project moves forward.
Looking for a Custom 500ml Soft Flask?
Honey Dry Bag works with B2B buyers on TPU soft flask projects for running, trail running, endurance sports and outdoor hydration applications.
Depending on the project, we can discuss:
- 250ml, 350ml, 500ml and other capacity options
- Product dimensions
- TPU soft flask configurations
- Logo customization
- Product colors
- Cap and bite valve options
- Additional carrying components
- Packaging
- Sample development
- OEM and ODM requirements
If you are sourcing a custom 500ml soft flask, contact us with your intended application, target quantity, destination market and customization requirements.
We can discuss suitable existing models and whether a physical sample should be evaluated for your project.
