Preserve the flavor and aroma of your favorite wine thanks to this promotional wine stopper! It's made of stainless steel, fits over most wine bottles up to 30.6mm diameter and provides an airtight seal. Press the button on top to seal, and push again to release. It does not work on threaded wine bottles with screw on caps. Each stopper measures 1 5/8" x 1 3/4" and can display an engraved brand name, logo, message and more!