Designed for threaded essential oil bottles, these stoppers provide a secure and airtight seal to keep your oils fresh. The transparent design allows for easy identification of the contents, allowing you always know which oil you're using. These stoppers are ideal for maintaining the quality and smell of your essential oils. Features -Color:Transparent -Material:Rubber -Size:1.50X1.50X0.80cm/0.59X0.59X0.31in -Leakfree: the replacement stopper allows no essential oil leakage, keeping the bottle's interior dry and preventing oil evaporation -Transparent stopper: the clear stopper design allows you to see the remaining oil clearly, making it easy to refill in time -Secure seal: the sealing plug tightly seals the bottle, effectively preventing air from entering and maintaining the purity and aroma of the essential oil -Userfriendly: the screw cap design is easy to tighten and not prone to loosening, allowing the bottle's sealing performance and preventing oil spillage -Versatile application: suitable for various settings such as home, office, and spa, allowing you to enjoy the aroma and benefits of essential oils anytime Package list: 100 x essential oil bottle plugs