Come and Check Our Branding Solutions for All Our Clients. The lower wine bottle stopper is made of food-grade silicone, the upper rod air pump is made of food-grade acrylic, high quality safe materials won't change the flavor of red wine and other beverages. Just insert the stopper into the bottle and pull up&down the tie rod to seal the bottle air tight, easily retain the wine flavors and aromas in the bottle. Let the remaining wine as fresh as the wine opened on first day. The stoppers fit most red and white wine bottle sizes, and will stand firmly on the bottle mouth. Our prices include shipping cost to ca, QTY for 7000pcs and over by sea. Pls check inventory and detailed info before placing your orders.