The Üllo wine purifier targets sulfites that can potentially cause unwanted side effects (for you) and alter taste (for your wine). Sulfites work as a preservative to keep wine fresh until the cork is popped. They can cause things like a stuffy nose for some people and even affect a wine’s flavor. Just pour a glass (or bottle) of wine through the sulfite capture filter and enjoy. Wine is now in its purest, preservative-free form. If you’re sipping a red, the filter can serve as an aerator, too.