What's the best way to open a sustanon amp? I think I read somewhere that I should put a pen cap over the top of it, and snap it off. When I break it off, will the amp break clean, or will some of the glass fragment, and fall into the liquid? And after I get it open, I assume I just stick the needle in it, and pull the liquid out, right? Doesn't opening the amp cause it to no longer be sterile?