For use with the Bartender Sure-Seal Wine Saver Set, take the guess work out of resealing open bottles of white or red wine. Using a built-in indicator on the stopper and a multi-point airtight seal, the Bartender Sure-Seal Wine Saver Stopper precisely removes the exact amount of oxygen required without damaging the preserved wine of its natural flavours and aroma, reducing oxidization and prolonging a wine's lifespan. To use, push stopper into bottle, using the Bartender vacuum pump, line up the stopper and pump until the indicator disappears. Airtight seal allows bottles to be laid horizontally. If the indicator reappears, it's time to drink your wine, or repressurise. Suitable for white or red wine. Set of 2. Includes built-in oxygen indicator multi-point airtight seal. Handwash only.