Features: Made of safe and non-toxic acrylic and silicone, the wine bottle stopper clean and healthy to use. Help to keep the wine fresh about 15 days after the bottle is opened. Pump vacuum design, the bottle stopper will prevent the wine from contacting with air to keep its fresh. Easy to use, washable and reusable. Practical tool for home use to reduce waste. Specifications: Condition: 100% Brand New Material: Acrylic + Silicone Color: White + Black Cap Diameter: approx. 2.5cm / 0.98in Bottom Diameter: approx. 1.8cm / 0.71in Max. Total Height: approx. 12.4cm / 4.88in Weight: approx. 25g Package Included: 1 x Vacuum Bottle Stopper Note: 1. For better preservation, please pump air out about every 5~7 days. 2. After preservation, please gently shake the bottle stopper to equilibrium internal and external pressure and then pull it out.