Reusing vials definitely increases the chances of contamination.
Brew 9 vials now and then brew another batch once you get some more vials or simply order some more vials now, you gonna need them anyway.
I see where you coming from but the more you use one stopper the more chances of contamination.I reuse my vials all the time. It really isn't much more chance for contamination. If you didn't get an infection off the first batch of oil, why would the second batch be any worse off? However, if the silicon membrane is beat up, don't reuse it. Won't be airtight.
No worries, definitely not worth the risk to save $7 or so.
BTW What size vials do you use?
And how is that Tren treating you? Mines definitely working 17 lbs in just over 5 weeks.

