The interior is made of high quality durable PC, TPE and the exterior is acrylic and food grade rubber. Safe for the human body, non-toxic and high quality wine service. Keep Your Wine Fresh Longer - Minimizes wine oxidation by drawing air out of the bottle. Simply vacuum the cork several times until it is tight. This will help preserve the flavor of the bottle for weeks instead of days. The perfect solution for your home, bar or restaurant. No Spills or Leaks - Rubber vacuum seals fit most wine bottles as well as others with similar properties. It keeps better than the original cork and prolongs the freshness of the wine. SAFE AND HIGH QUALITY - Perfect for home, hotel, club, bar and more. Widely used - fits most wine and champagne bottles. In the unfortunate event that your bottle cannot be used, please contact us for a return.