Homework / test English to Spanish Medical Medical: Pharmaceuticals

Good morning, I need help with the translation of the term "final container closure" into Spanish. I've found that "container closure"is translated as *cierre de envase*, *sistema de cierre y envase*... but I don't think this is the right way of translating here, as I am not a Translator yet, and as I am most of the time wrong with my guessing I need help with this. This sentence is part of a paragraph of a project we are working at school about vaccines. Thanks for your help.


Our Vaccine is filled into the final container closure, labelled and packaged in the Packaging Facility . In the filling line there is currently a strainer assembly consisting of a single use nylon mesh strainer