Well... firstly, you can get 10ml empty sterile vials from many places like amazon even.
secondly, stealth doesn't need to be filtered. Though I've heard of some paranoid people using a whatman filter .45 and with luke warm oil, takes about 3 minutes to filter 20 ML of gear. Filtering with a 0.22 will take hours. When filtering, I've heard people using 20cc because of pressure.
But as I said... doesn't need to be filtered. some do, most if not nearly all don't filter.