Ullo believes that with no sulfite added as wine preservative, wine is best enjoyed the way winemakers promised it to be. This purifies the wine to restore its natural state, a gentler and sulfite-free beverage. It uses the Selective Sulfite Capture technology in maintaining wine’s original taste and texture while lessening sulfite and filtering sediments. For the benefit of everyone, it also uses Proprietary Polymer technology to purify and filter the bitter taste of wine. To suit your preference, you can select to aerate your wine through a simple twist. They designed this product to perfectly fit on top of any wine glass and decanter.