This adapter allows taller 750ml bottles to be used in the Pek Supremo or Pek Preservo wine preserver models. Tall bottles include most rieslings, and some other wine bottles with a taller format. Features: -For use only with the Supremo and Preservo models -Allows taller bottles of wine to be used in the wine preservers -Great for wine lovers View a demonstration of the Pek Preservino!