I think i get through about 4-5 ml a day, sometimes more, if i am on a late watch (1200-2230) i will near enough chain vape from 1600 onwards as the civvies finish then.
But i do stealth vape alot at work, i am not bothered if people see me, but i am discrete, no one really bothers me otherwise i put my angry face on lol!
But i am now thinking i will drop my strength from 18 down to 12.