Polypropyyynene screp cap yokhala ndi septum-the Polyppoplene screw chipewa ndi septum imapereka chisindikizo chotsutsa. Kusanjikiza kawiri kumaphatikizapo silicone ndi PTF. Septune septum ikhoza kulowetsedwa kangapo. Screw Caps yokhala ndi PTFF imagwiritsidwa ntchito pazolinga za nyama. Chipewa cha screw chimapereka chidindo cholimba, chopindika mpweya ndipo chimatha kutengedwa mwachindunji kudzera pa singano ndi singano ya syringe.