Korea Plastic Corporation(한국 플라스틱 공사)is working on Polycarbonate Water Bottles with narrow necks to put into Pressure inside, just like Fire Extinguishers in the world at initial stage to replace all metals/glass with engineering plastics.
Polycarbonate Cylinder*™*(PC)™ Polycarbonate Cylinder*TM* for Pressure-Containers can be used for Fire Extinguishers, Aerosol Sprays for insect killers, Hair Sprays or Topics and also for Spray(Aerosol) Types of Fire Extinguishers; Main Characteristics of Polycarbonate: a. Transparent/Nude/Visible/Clean b. Strong enough for +140C -60C c. Weather-resistant d. Impact-Resistant e. Heat-Resistant f. UV Sustainable g. Engineering Plastics from GE, LG Dow-Chemical, SABIC Plastics, Bayer and DuPont