By observing practices in wineries, the creator of Private Preserve noticed the constant use of inert gas in preserving wine stored in tanks, barrels and carboys to prevent oxidation. He decided to figure out how to bring the benefits of professional wine preservation to the consumer. Through constant testing, he was able to formulate a mixture of inert gases (essentially pure air with no oxygen) to preserve wine inside a bottle which has been uncorked and recorked, allow the preservation to continue for months and even years. We now we have the essential wine accessory second in importance only to the corkscrew, Private Preserve.