I KNOW THAT YOU SHOULDNT REUSE NEEDLES BUT IF YOU DO AND YOU KEEP PUTTING IT BACK INTO SAY A 10CC BOTTLE WILL IT RUIN THE REST OF THE BOTTLE OR ARE YOU JUST RUNNING THE RISK FOR INFECTION
well, aside from the flames youre gonna get because a new needle is all of about 30 cents, sterilize it in alcohol first and there wont be anything left on it to contaminate the bottle
If you wouldn't use it to stick again why use it in the vial. Whatever contamanants would be on the needle will just go into your sauce and still end up in you. Buy some needled cheapo!