Well, it's just like filling a blank cart yourself. I can usually get about 14 drops in one, give or take a drop. Now 1 ml. equals approx. 20 drops. If you hold a dropper at a 45 degree angle you get about 45% less in a drop, so the way you handle it matters. A reg. full flavor
tobacco cig. has about 1 mg. of nictotine. So, if you used an
e-liquid of 20 mg. strength (that's 20 mg. per ml.), then 1 ml. would equal a pack of cigs, and 1 drop would about equal 1 cigarette. 18 mg. liquid is close enough (that's 18 mg. per ml.). So, a 1 pack a day smoker would use 1 ml. per day, or one 30 ml bottle a month. Dr. E. G.