Check the listing for details. carbo mizer 450.. Condition: Used. Listed at 2000.00 USD. The Carbo-Mizer 450 is a stationary bulk carbon dioxide (CO2) storage system designed for businesses, particularly for beverage carbonation in high-volume applications. It replaces the need to store multiple high-pressure CO2 cylinders and features double-walled stainless steel construction with vacuum insulation for long-term efficiency. The system is automated, requires no electricity, and includes easy-to-read gauges for contents and pressure, with an option for uni-body legs.