1.What are your quality standards? 

(AQL level? Defect definition: tolerance for bubbles, stones, cracks, seams, eccentricity, etc.?)

2.What quality inspection reports do you have? 

(SGS, Intertek, REACH, FDA food contact grade, LFGB, California Prop 65, etc.?)

3.What glass material is used?

 (Soda-lime, high white glass, crystal white glass, borosilicate glass? Lead content? Heavy metal migration testing?)

4.How do you ensure batch consistency?

 (What is the controllable range for color/weight/size deviations between different batches?) 

5.Have you conducted leakage/compatibility testing? 

(Does the product not leak, discolor, or corrode after long-term contact with alcohol/fragrance?)

Custom Cosmetic Packaging Supplier | Glass Bottles & PET Bottles | Small MOQ | OEM/ODM | For Beauty & Fragrance Brands