A dual-layer HDPE one-piece structure with outstanding barrier properties, resisting external contaminant ingress while suppressing permeation and leaching from the media inside. Paired with a PTFE sealing gasket it resists corrosive electronic chemicals with reliable, leak-proof sealing. The drum is dust-free ultra-clean washed with strict particle and metal ion leaching control, so high-purity chemicals are not contaminated. The carrying structure eases transfer and dispensing, colours can be customised, and it suits transfer storage and short-distance delivery of semiconductor reagents and photoresist ancillary chemicals.