Crafted for precision, these bottle stoppers are ideal for essential oil bottles with an thread. The transparent design allows you to easily see the contents, allowing you never mix up your oils. These stoppers are essential for anyone looking to maintain the purity of their essential oils. Features -Color:Transparent -Material:Rubber -Size:1.50X1.50X0.80cm/0.59X0.59X0.31in -No leakage: the essential oil bottle plug allows that there is no leakage of essential oils, keeping the bottle dry and preventing evaporation -Transparent design: the clear stopper allows you to easily monitor the remaining amount of essential oil, allowing timely refills -Secure seal: the threaded design provides a tight seal, preventing air from entering and preserving the oil's purity and fragrance -Userfriendly: the screw cap is easy to tighten and stays secure, allowing the bottle remains sealed and preventing any oil leaks -Multiple applications: ideal for use in homes, offices, and spas, providing the benefits and aroma of essential oils in various environments Package list: 100 x essential oil bottle plugs