Question Regarding Sterilizing Sachets

I’ve read a lot about some of the hygiene concerns people have raised about gear stored in sachets. I was planning on filtering sustanon through a Whatman filter into vials instead of storing them in pre-loaded syringes. My question is whether I can store my gear in the vials once I have punctured the seal on the top. Doesn’t that defeat the purpose of storing them in vials?

The top of the vail has a rubber seal that will seal itself when you remove the needle.That way your gear stay sterile.