38/400 Black Smooth Screw-On Cap with PS Printed (SFYP) Liner. Fits our 1-gallon glass or plastic bottles, our 100 cc and 150 cc packers, or any bottle with a 38/400 neck size. The PS printed liner is crafted from foamed polystyrene and adheres to the bottle’s opening when the cap is firmly screwed on. This cap ensures durability and reliability for various container neck finishes (see above). This cap ensures excellent sealing and protection for products in industries requiring secure packaging solutions. It is compatible with containers with a 38/400 neck finish and makes it suitable for pharmaceutical, chemical, and cosmetic industries. The cap’s ability to maintain product integrity during storage and transport, makes for customer satisfaction and regulatory compliance. Shipping and handling are made safer with its secure sealing, reducing the risk of leaks or contamination during transit.