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Water bottle pre-shipment inspection:

The onsite quality check for stainless steel bottles, workout bottles, thermo bottles, water bottles, sports bottles, travel mugs in Yongkang where there are lots of such bottles factories:

A. Quantity check NOT OK
B. Shipping marks & packing OK
C. Label, logos and colors OK
D. Styles & measurements OK
E. Onsite safety and function tests NOT OK
F. Special requirements NOT OK
G. AQL workmanship
(Visual defects)

There are below types of on-site 3rd party QC inspections for drinking bottles:

water bottle pre-shipment inspection

For examples, below is an onsite QC Check inspection test list for a glass bottles:

Check carton mark descriptions.  OK
Carton drop test- 1 carton each item
One corner, three edges, six sides, at height of
30inch (﹤9.5kg)
24inch (9.5kg~18.6kg)
18inch (18.6kg~27.7kg)
12inch (27.7kg~45.3kg)
8inch (45.3kg~68kg) on the cement floor
Not OK
check the smell of product/filling is bad smell? No Fillings N/A
Do tape test on all inside and outside coatings.  -S2 OK
Use white tissue or bright light to check for coating defectives. 
Do hot water test for glass  Not OK
To report on 6 random samples for : diameter, height, fill volume and weight.   Not OK
Do leak test for bottles 6 samples.  OK
On decoration important quality criteria are spray defects, color variations from item to item and also in the same item from top to bottom or from side to side. OK
Fitting check OK
Perform quantity and assortment check in each package OK
Wobble test-II
- Place samples onto a flat glass surface, no wobble.

3rd party preshipment products goods factory onsite inline final Random AQL PSI TPI FRI DUPRO third party on-site in-line QA QC check quality control assurance services in China India Vietnam Thailand Malaysia Bangladesh Taiwan.