| Leak test | Filled with water, lid closed, inverted for 30 minutes | 32 | 1 leak (P-03), counted as major | Remark |
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| Vacuum insulation | Filled with water at 95 °C; outer wall checked by hand after 10 minutes | 32 | All outer walls at room temperature | OK |
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| Lid fit and thread | Lid screwed on and off 10 times; seal and alignment checked | 32 | No cross-threading or binding | OK |
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| Alloy check (XRF) | Handheld analyser on the inner wall | 5 | 304 (18/8) stainless steel confirmed | OK |
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| Coating adhesion | Cross-hatch test, ISO 2409 | 3 | Class 1; specification class 1 or better | OK |
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| Capacity | Water fill to the brim, measured in a cylinder | 5 | 768–775 ml; specification ≥ 750 ml | OK |
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| Barcode scan | EAN-13 on gift box and carton label | 20 | All decode and match the SKU | OK |
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| Carton drop test | 10 drops (1 corner, 3 edges, 6 faces), ISTA 1A style | 1 carton | No damage to boxes or bottles | OK |