The production of a stainless steel 304 milk bucket involves precision engineering, with the polishing stage being the most crucial step to ensure hygiene and durability. After shaping the bucket from food-grade stainless steel sheets using cutting and welding techniques, meticulous attention is turned to surface treatment. **Polishing is paramount**—the interior and exterior surfaces undergo multi-stage abrasion, starting with coarse grinding to remove weld seams and imperfections, followed by progressively finer polishing until a mirror-like finish is achieved. This ultra-smooth surface eliminates microscopic pores and ridges where bacteria or milk residue could accumulate, ensuring **zero hygienic dead zones**.