OK, as one comment said, there are variables, but you want a good math ballpark? OK A reg cig (full flavor) is about 1 mg. of nic. So, a pack is 20 mg. At 20 mg./ml., 2 ml = 2 packs. There are 20 drops in a ml., so one drop = 1 real cig. Got it?
Now, variables to consider: an unltra...