Quality inspection requirements for glass bottle

(1) Bottle Capacity and Dimension Check:

Capacity: 500ml and 950ml
Bottle diameter: (±2) mm
Total bottle height (without lid): (±2) mm
Bottle wall thickness: (±0.2) mm
Bottom thickness: (1) For 500ml bottles: bottom thickness shall not be less than 1.5mm; (2) For 950ml bottles: edge thickness 10mm (±2mm), center thickness shall not be less than 1.5mm.
Finished bottles must not exceed the above dimensional ranges. Please use calipers to check each bottle before packaging. Any bottles that do not meet the above dimensions must be set aside.

(2) Bottle Defect Inspection:

Check whether the bottles are wiped clean. Any unclean bottles must be rejected. Inspect for black spots, scratches, damage on the bottle surface, and presence of glass debris inside the bottle.
The bottle mouth must be smooth and even. Also, the rim must be free of cracks, jagged edges, and bubbles.
The bottom of the bottle must be stable and level.
The mold lines on the bottle surface must not be too prominent.
Borosilicate glass can withstand instantaneous temperatures from -20°C to 150°C. We also need to test: a) Pour boiling water into the bottle to check if it remains intact; b) Fill the bottle with water and place it in the freezer (quick-freeze compartment) to check if it remains intact.

(3) Accessory Inspection (Silicone Sleeve, Fabric Cover, Lid, Packaging, etc.):

Each lid must have a silicone gasket inside. The silicone gasket must not be damaged or broken. Also, check that the silicone gasket is properly seated and not misaligned.
Lids and silicone sleeves must be clean and free of scratches and damage.
Try fitting each lid onto the bottle to check if it is too loose or cannot be closed properly. Additionally, after filling the bottle with water, turn it upside down to check that there is no leakage.
Check that the silicone sleeve or fabric cover fits the bottle properly.
Silicone sleeve color reference: [as per picture/attached image].
The box and outer carton must be clean and free of dirt or stains. Check that the box dimensions are correctly designed.

(4) Logo Inspection:

Check that the logo on the bottle body is affixed straight and that the size, color, and position are correct.
The logo must not be blurry, bubbled, ghosted, missing, stained, or otherwise defective.