THe plastic is not a good idea for long term store, Im a bit worried about the "satchels" along the same line. It wouldnt hurt to ask Vet or FreakFestMD. Without seeing them they may not be able to judge.
Also, you want bare minimum atmospheric exposure to stuff in vials.
Wipe the top w/ alcohol every time before stick needle in to withdrawl. I Wipe amp necks w/ alcohol same before scoring and cracking.