Made from corrosion-resistant 316L stainless steel, the entire body is electrolytically ground and mirror polished inside and out. The smooth, pore-free inner wall greatly reduces photoresist solvent clinging and residue, suppressing metal ion leaching that would contaminate the media. An integrated side handle serves both single-person carrying and production line transfer, while the small sealed opening blocks light and oxygen. Stable temperature and pressure performance suits electronic-grade cleaning liquids and photoresist reagents, covering both R&D samples and pilot-scale small-batch feeding in cleanroom laboratories and small semiconductor lines.