Bro I've got like 3 or 4 tiny chunks of the rubber stopper in my 50ml vial in varying sizes, probably because I was drawing with an 18g cannon. They never sucked in honestly because I avoid them, but I know for sure if you draw with a 22 or 23g, there's no way they're going to suck into the syringe. It won't contaminate it either because of the BA content. It will be fine