Lets say i have a 1/2 a 10 mil vial of prop, and wanted to add 5 amps of sust to that vial, would it be safe and sterile ?? Im just trying to make it eaiser to pull when im on vacation, with out the old lady finding out.. This wont be for another month or so, but i was just curious.. I have to find sterile vials, but i dont see the difference in switching, to a new vial, when the old one still has to still be sterile..