The shops I visit on Guam all have testors, I bring in my mod though cause thats what I will be using, however I do my sampling with an Ego-w rather than my 26650 dreadnaut, when I juice my dreadnaut I can easily fill a whole dropperfull on my wick and coil. I dont think the owners want me doing that. So with the Ego-w, one drop on each coil does the trick, I can get a good taste, blow off excess then move on to the next flavor I want to try.