Check the listing for details. 60 Pcs 18mm Plastic Replacement Bottle Cap with Hopper Inner Plug. Condition: New. Listed at 18.63 USD. Description:Material: These bottle covers are made of PP plastic. They are resistant to high temperatures and chemical corrosion and can be reused. It is very suitable for replacing lost or damaged bottle caps.Strong Sealing: The bottle cap is designed to fit tightly with the bottle mouth to prevent liquid leakage or volatilization, which promotes sealing.How to Install: To use the bottle caps, screw them onto bottles with compatible neck sizes. Twist the cap open when you need to dispense the contents and twist it closed securely after use to prevent any leakage or drying out.Wide Application: Plastic caps with built-in inner plugs, improved sealing performance, and strong barrier properties, are suitable for essential oil bottles, perfume bottles, and cosmetic bottles for liquid dispensing.