Preserve the flavor of your favorite wine. Wether is red, white or pink, these OXO stoppers will lock in the freshness. Press down on the flat top of the stainless steel accent, and the silicone seal will expand to fit your bottle. The seal keeps it air tight to keep it as fresh as the day you opened it. The silicone seal is leak and spill proof so no matter if it's in the refrigerator door or laying on its side on a shelf, it will preserve every drop.