Introducing ZOS, the most effective and easiest way to save open bottles of wine. Simply insert the ZOS stopper with the attached, oxygen-absorbing cartridge into an open bottle of wine. Within minutes, ZOS removes 100% of the oxygen that causes wine to go bad. ZOS preserves your wine for months and lets you enjoy every bottle by the glass at your own pace. The oxygen-absorbing cartridges last about 10 bottles depending on use. An electronic cartridge tester display stand will let you know when you need to replace the cartridge. Developed by a team of engineers and wine enthusiasts with over 20 years of experience in wine preservation technology, ZOS is the only wine saver that removes 100% of the oxygen that spoils wine. ZOS’s proprietary technology is the result of a three-year development and research partnership with our global partners. The ZOS Wine Saver Kit includes; wine stopper, oxygen absorbing cartridge, and electronic cartridge tester display stand.