Formed in one piece from dual-layer HDPE with a PTFE corrosion-resistant sealing gasket for long-lasting, leak-proof containment. Ultra-clean processing keeps particle and metal ion leaching extremely low so high-purity reagent and electronic chemical test results are not disturbed. Available in brown, black, white and other custom colours, suited to laboratory sampling and trace reagent dispensing. The bottle is light and easy to hold, and the threaded cap opens and closes smoothly for repeated use — meeting small-volume clean liquid storage needs in semiconductor testing and chemical R&D.