Was recommend here to get some Joyetech atomizers for tasting DIY ejuice. Was given a link and purchased some. Just received them and they are just a 510 connection with a well inside that I can see the atomizer. Am I suppose to add juice in there and put on any drip tip for testing? Something seems off as it appears I'll just get juice in my mouth, or is that how they work for testing ejuices? These are the ones I got, though without the toppers. Do I need those (look like rubber) tips? Joye 510 or Joye eGo electronic cigarette replacement atomizers